Prevent Privilege Escalation: Add Assignment Restrictions for Roles and Permissions

modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs

@@ -9,6 +9,7 @@ using Volo.Abp.Application.Dtos;
 using Volo.Abp.Authorization.Permissions;
 using Volo.Abp.Data;
 using Volo.Abp.ObjectExtending;
+using Volo.Abp.Users;
 
 namespace Volo.Abp.Identity;
 
@@ -69,7 +70,8 @@ public class IdentityUserAppService : IdentityAppServiceBase, IIdentityUserAppSe
     [Authorize(IdentityPermissions.Users.Default)]
     public virtual async Task<ListResultDto<IdentityRoleDto>> GetAssignableRolesAsync()
     {
-        var list = (await RoleRepository.GetListAsync()).OrderBy(x => x.Name).ToList();
+        var currentUserRoles = await UserManager.GetRolesAsync(await UserManager.GetByIdAsync(CurrentUser.GetId()));
+        var list = (await RoleRepository.GetListAsync(currentUserRoles)).OrderBy(x => x.Name).ToList();
         return new ListResultDto<IdentityRoleDto>(ObjectMapper.Map<List<IdentityRole>, List<IdentityRoleDto>>(list));
     }
 
@@ -145,7 +147,9 @@ public class IdentityUserAppService : IdentityAppServiceBase, IIdentityUserAppSe
     {
         await IdentityOptions.SetAsync();
         var user = await UserManager.GetByIdAsync(id);
-        (await UserManager.SetRolesAsync(user, input.RoleNames)).CheckErrors();
+
+        var effectiveRoles = await FilterRolesByCurrentUserAsync(user, input.RoleNames);
+        (await UserManager.SetRolesAsync(user, effectiveRoles)).CheckErrors();
         await UserRepository.UpdateAsync(user);
     }
 
@@ -189,7 +193,26 @@ public class IdentityUserAppService : IdentityAppServiceBase, IIdentityUserAppSe
         (await UserManager.UpdateAsync(user)).CheckErrors();
         if (input.RoleNames != null && await PermissionChecker.IsGrantedAsync(IdentityPermissions.Users.ManageRoles))
         {
-            (await UserManager.SetRolesAsync(user, input.RoleNames)).CheckErrors();
+            var effectiveRoles = await FilterRolesByCurrentUserAsync(user, input.RoleNames);
+            (await UserManager.SetRolesAsync(user, effectiveRoles)).CheckErrors();
         }
     }
+
+    protected virtual async Task<string[]> FilterRolesByCurrentUserAsync(IdentityUser user, string[] inputRoleNames)
+    {
+        var targetCurrentRoleSet = (await UserManager.GetRolesAsync(user)).ToHashSet(StringComparer.OrdinalIgnoreCase);
+
+        var operatorUser = await UserManager.GetByIdAsync(CurrentUser.GetId());
+        var operatorOwnRoleSet = (await UserManager.GetRolesAsync(operatorUser)).ToHashSet(StringComparer.OrdinalIgnoreCase);
+
+        var inputRoleNameSet = new HashSet<string>(inputRoleNames ?? Array.Empty<string>(), StringComparer.OrdinalIgnoreCase);
+        var keepUnmanageableRoles = targetCurrentRoleSet.Except(operatorOwnRoleSet);
+
+        var desiredManageableRoles = inputRoleNameSet.Intersect(operatorOwnRoleSet);
+
+        return keepUnmanageableRoles
+            .Concat(desiredManageableRoles)
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+    }
 }

modules/identity/src/Volo.Abp.Identity.Web/Pages/Identity/Users/EditModal.cshtml

@@ -83,7 +83,14 @@
                             @for (var i = 0; i < Model.Roles.Length; i++)
                             {
                                 var role = Model.Roles[i];
-                                <abp-input abp-id-name="@Model.Roles[i].IsAssigned" asp-for="@role.IsAssigned" label="@role.Name" />
+                                @if (role.IsAssignable)
+                                {
+                                    <abp-input abp-id-name="@Model.Roles[i].IsAssigned" asp-for="@role.IsAssigned" label="@role.Name" />
+                                }
+                                else
+                                {
+                                    <abp-input abp-id-name="@Model.Roles[i].IsAssigned" asp-for="@role.IsAssigned" label="@role.Name" disabled="true" readonly="true" />
+                                }
                                 <input abp-id-name="@Model.Roles[i].Name" asp-for="@role.Name" />
                             }
                         </div>

modules/identity/src/Volo.Abp.Identity.Web/Pages/Identity/Users/EditModal.cshtml.cs

@@ -41,18 +41,32 @@ public class EditModalModel : IdentityPageModel
         UserInfo = ObjectMapper.Map<IdentityUserDto, UserInfoViewModel>(user);
         if (await PermissionChecker.IsGrantedAsync(IdentityPermissions.Users.ManageRoles))
         {
-            Roles = ObjectMapper.Map<IReadOnlyList<IdentityRoleDto>, AssignedRoleViewModel[]>((await IdentityUserAppService.GetAssignableRolesAsync()).Items);
+            var assignableRoles = (await IdentityUserAppService.GetAssignableRolesAsync()).Items;
-        }
+            var currentRoles = (await IdentityUserAppService.GetRolesAsync(id)).Items;
-        IsEditCurrentUser = CurrentUser.Id == id;
+            
-
+            // Combine assignable and current roles to show all roles user has
-        var userRoleIds = (await IdentityUserAppService.GetRolesAsync(UserInfo.Id)).Items.Select(r => r.Id).ToList();
+            var combinedRoles = assignableRoles
-        foreach (var role in Roles)
+                .Concat(currentRoles)
-        {
+                .GroupBy(role => role.Id)
-            if (userRoleIds.Contains(role.Id))
+                .Select(group => group.First())
+                .ToList();
+
+            Roles = ObjectMapper.Map<IReadOnlyList<IdentityRoleDto>, AssignedRoleViewModel[]>(combinedRoles);
+
+            var currentRoleIds = currentRoles.Select(r => r.Id).ToHashSet();
+            var assignableRoleIds = assignableRoles.Select(r => r.Id).ToHashSet();
+            foreach (var role in Roles)
             {
-                role.IsAssigned = true;
+                role.IsAssigned = currentRoleIds.Contains(role.Id);
+                role.IsAssignable = assignableRoleIds.Contains(role.Id);
             }
         }
+        else
+        {
+            Roles = Array.Empty<AssignedRoleViewModel>();
+        }
+        
+        IsEditCurrentUser = CurrentUser.Id == id;
 
         Detail = ObjectMapper.Map<IdentityUserDto, DetailViewModel>(user);
 
@@ -129,6 +143,8 @@ public class EditModalModel : IdentityPageModel
         public string Name { get; set; }
 
         public bool IsAssigned { get; set; }
+
+        public bool IsAssignable { get; set; }
     }
 
     public class DetailViewModel

modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/FakeCurrentPrincipalAccessor.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Security.Claims;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Security.Claims;
+
+namespace Volo.Abp.Identity;
+
+[Dependency(ReplaceServices = true)]
+public class FakeCurrentPrincipalAccessor : ThreadCurrentPrincipalAccessor
+{
+    private readonly IdentityTestData _testData;
+
+    public FakeCurrentPrincipalAccessor(IdentityTestData testData)
+    {
+        _testData = testData;
+    }
+
+    protected override ClaimsPrincipal GetClaimsPrincipal()
+    {
+        return GetPrincipal();
+    }
+
+    private ClaimsPrincipal _principal;
+
+    private ClaimsPrincipal GetPrincipal()
+    {
+        if (_principal == null)
+        {
+            lock (this)
+            {
+                if (_principal == null)
+                {
+                    _principal = new ClaimsPrincipal(
+                        new ClaimsIdentity(
+                            new List<Claim>
+                            {
+                                new Claim(AbpClaimTypes.UserId, _testData.UserAdminId.ToString()),
+                                new Claim(AbpClaimTypes.UserName, "administrator"),
+                                new Claim(AbpClaimTypes.Email, "administrator@abp.io")
+                            }
+                        )
+                    );
+                }
+            }
+        }
+
+        return _principal;
+    }
+}

modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserAppService_Tests.cs

@@ -1,10 +1,13 @@
 using System;
+using System.Linq;
+using System.Security.Claims;
 using System.Threading.Tasks;
 using Shouldly;
 using Volo.Abp.Authorization.Permissions;
 using Volo.Abp.Data;
 using Volo.Abp.PermissionManagement;
 using Volo.Abp.PermissionManagement.Identity;
+using Volo.Abp.Security.Claims;
 using Xunit;
 
 namespace Volo.Abp.Identity;
@@ -16,6 +19,7 @@ public class IdentityUserAppService_Tests : AbpIdentityApplicationTestBase
     private readonly IPermissionManager _permissionManager;
     private readonly UserPermissionManagementProvider _userPermissionManagementProvider;
     private readonly IdentityTestData _testData;
+    private readonly ICurrentPrincipalAccessor _currentPrincipalAccessor;
 
     public IdentityUserAppService_Tests()
     {
@@ -24,6 +28,7 @@ public class IdentityUserAppService_Tests : AbpIdentityApplicationTestBase
         _permissionManager = GetRequiredService<IPermissionManager>();
         _userPermissionManagementProvider = GetRequiredService<UserPermissionManagementProvider>();
         _testData = GetRequiredService<IdentityTestData>();
+        _currentPrincipalAccessor = GetRequiredService<ICurrentPrincipalAccessor>();
     }
 
     [Fact]
@@ -239,6 +244,114 @@ public class IdentityUserAppService_Tests : AbpIdentityApplicationTestBase
         roleNames.ShouldContain("manager");
     }
 
+    [Fact]
+    public async Task UpdateRolesAsync_Should_Not_Assign_Roles_Operator_Does_Not_Have()
+    {
+        // neo only has "supporter" role
+        using (_currentPrincipalAccessor.Change(new Claim(AbpClaimTypes.UserId, _testData.UserNeoId.ToString())))
+        {
+            // Try to assign "admin" and "supporter" to david (who has no roles)
+            await _userAppService.UpdateRolesAsync(
+                _testData.UserDavidId,
+                new IdentityUserUpdateRolesDto
+                {
+                    RoleNames = new[] { "admin", "supporter" }
+                }
+            );
+        }
+
+        // Only "supporter" should be assigned (admin filtered out since neo doesn't have it)
+        var roleNames = await _userRepository.GetRoleNamesAsync(_testData.UserDavidId);
+        roleNames.ShouldContain("supporter");
+        roleNames.ShouldNotContain("admin");
+    }
+
+    [Fact]
+    public async Task UpdateRolesAsync_Should_Preserve_Unmanageable_Roles()
+    {
+        // john.nash has direct roles: moderator, supporter
+        // neo only has "supporter" role, so "moderator" is unmanageable for neo
+        using (_currentPrincipalAccessor.Change(new Claim(AbpClaimTypes.UserId, _testData.UserNeoId.ToString())))
+        {
+            await _userAppService.UpdateRolesAsync(
+                _testData.UserJohnId,
+                new IdentityUserUpdateRolesDto
+                {
+                    RoleNames = new[] { "supporter" }
+                }
+            );
+        }
+
+        // "moderator" should be preserved (unmanageable), "supporter" kept (in input)
+        var roleNames = await _userRepository.GetRoleNamesAsync(_testData.UserJohnId);
+        roleNames.ShouldContain("moderator");
+        roleNames.ShouldContain("supporter");
+    }
+
+    [Fact]
+    public async Task UpdateRolesAsync_Should_Only_Remove_Manageable_Roles()
+    {
+        // john.nash has direct roles: moderator, supporter
+        // neo only has "supporter" role
+        using (_currentPrincipalAccessor.Change(new Claim(AbpClaimTypes.UserId, _testData.UserNeoId.ToString())))
+        {
+            // Input is empty - try to remove all roles
+            await _userAppService.UpdateRolesAsync(
+                _testData.UserJohnId,
+                new IdentityUserUpdateRolesDto
+                {
+                    RoleNames = Array.Empty<string>()
+                }
+            );
+        }
+
+        // "moderator" should be preserved (neo can't manage it), "supporter" removed (neo has it and it's not in input)
+        var roleNames = await _userRepository.GetRoleNamesAsync(_testData.UserJohnId);
+        roleNames.ShouldContain("moderator");
+        roleNames.ShouldNotContain("supporter");
+    }
+
+    [Fact]
+    public async Task UpdateRolesAsync_Self_Cannot_Add_New_Roles()
+    {
+        // neo only has "supporter", tries to add "admin" to self
+        using (_currentPrincipalAccessor.Change(new Claim(AbpClaimTypes.UserId, _testData.UserNeoId.ToString())))
+        {
+            await _userAppService.UpdateRolesAsync(
+                _testData.UserNeoId,
+                new IdentityUserUpdateRolesDto
+                {
+                    RoleNames = new[] { "supporter", "admin" }
+                }
+            );
+        }
+
+        // "admin" should not be added (neo doesn't have it), "supporter" kept
+        var roleNames = await _userRepository.GetRoleNamesAsync(_testData.UserNeoId);
+        roleNames.ShouldContain("supporter");
+        roleNames.ShouldNotContain("admin");
+    }
+
+    [Fact]
+    public async Task UpdateRolesAsync_Self_Can_Remove_Own_Roles()
+    {
+        // admin user has: admin, moderator, supporter, manager
+        // Remove supporter and manager from self
+        await _userAppService.UpdateRolesAsync(
+            _testData.UserAdminId,
+            new IdentityUserUpdateRolesDto
+            {
+                RoleNames = new[] { "admin", "moderator" }
+            }
+        );
+
+        var roleNames = await _userRepository.GetRoleNamesAsync(_testData.UserAdminId);
+        roleNames.ShouldContain("admin");
+        roleNames.ShouldContain("moderator");
+        roleNames.ShouldNotContain("supporter");
+        roleNames.ShouldNotContain("manager");
+    }
+
     private static string CreateRandomEmail()
     {
         return Guid.NewGuid().ToString("N").Left(16) + "@abp.io";

modules/identity/test/Volo.Abp.Identity.TestBase/Volo/Abp/Identity/AbpIdentityTestDataBuilder.cs

@@ -124,8 +124,11 @@ public class AbpIdentityTestDataBuilder : ITransientDependency
 
     private async Task AddUsers()
     {
-        var adminUser = new IdentityUser(_guidGenerator.Create(), "administrator", "admin@abp.io");
+        var adminUser = new IdentityUser(_testData.UserAdminId, "administrator", "administrator@abp.io");
         adminUser.AddRole(_adminRole.Id);
+        adminUser.AddRole(_moderatorRole.Id);
+        adminUser.AddRole(_supporterRole.Id);
+        adminUser.AddRole(_managerRole.Id);
         adminUser.AddClaim(_guidGenerator, new Claim("TestClaimType", "42"));
         await _userRepository.InsertAsync(adminUser);
 

modules/identity/test/Volo.Abp.Identity.TestBase/Volo/Abp/Identity/IdentityRoleRepository_Tests.cs

@@ -81,9 +81,9 @@ public abstract class IdentityRoleRepository_Tests<TStartupModule> : AbpIdentity
 
         roles.Count.ShouldBe(5);
         roles.ShouldContain(r => r.Role.Name == "admin" && r.UserCount == 2);
-        roles.ShouldContain(r => r.Role.Name == "moderator" && r.UserCount == 1);
+        roles.ShouldContain(r => r.Role.Name == "moderator" && r.UserCount == 2);
-        roles.ShouldContain(r => r.Role.Name == "supporter" && r.UserCount == 2);
+        roles.ShouldContain(r => r.Role.Name == "supporter" && r.UserCount == 3);
-        roles.ShouldContain(r => r.Role.Name == "manager" && r.UserCount == 1);
+        roles.ShouldContain(r => r.Role.Name == "manager" && r.UserCount == 2);
 
 
         using (var uow = UnitOfWorkManager.Begin())
@@ -96,7 +96,7 @@ public abstract class IdentityRoleRepository_Tests<TStartupModule> : AbpIdentity
         roles = await RoleRepository.GetListWithUserCountAsync();
 
         roles.Count.ShouldBe(5);
-        roles.ShouldContain(r => r.Role.Name == "manager" && r.UserCount == 0);
+        roles.ShouldContain(r => r.Role.Name == "manager" && r.UserCount == 1);
         roles.ShouldContain(r => r.Role.Name == "sale" && r.UserCount == 0);
     }
 }

modules/identity/test/Volo.Abp.Identity.TestBase/Volo/Abp/Identity/IdentityTestData.cs

@@ -5,6 +5,7 @@ namespace Volo.Abp.Identity;
 
 public class IdentityTestData : ISingletonDependency
 {
+    public Guid UserAdminId { get; } = Guid.NewGuid();
     public Guid RoleModeratorId { get; } = Guid.NewGuid();
     public Guid RoleSupporterId { get; } = Guid.NewGuid();
     public Guid RoleManagerId { get; } = Guid.NewGuid();

modules/identity/test/Volo.Abp.Identity.TestBase/Volo/Abp/Identity/IdentityUserRepository_Tests.cs

@@ -119,7 +119,8 @@ public abstract class IdentityUserRepository_Tests<TStartupModule> : AbpIdentity
     public async Task GetListByNormalizedRoleNameAsync()
     {
         var users = await UserRepository.GetListByNormalizedRoleNameAsync(LookupNormalizer.NormalizeName("supporter"));
-        users.Count.ShouldBe(2);
+        users.Count.ShouldBe(3);
+        users.ShouldContain(u => u.UserName == "administrator");
         users.ShouldContain(u => u.UserName == "john.nash");
         users.ShouldContain(u => u.UserName == "neo");
     }
@@ -127,14 +128,17 @@ public abstract class IdentityUserRepository_Tests<TStartupModule> : AbpIdentity
     [Fact]
     public async Task GetUserIdListByRoleIdAsync()
     {
+        var admin = await UserRepository.FindByNormalizedUserNameAsync(LookupNormalizer.NormalizeName("administrator"));
         var john = await UserRepository.FindByNormalizedUserNameAsync(LookupNormalizer.NormalizeName("john.nash"));
         var neo = await UserRepository.FindByNormalizedUserNameAsync(LookupNormalizer.NormalizeName("neo"));
+        admin.ShouldNotBeNull();
         john.ShouldNotBeNull();
         neo.ShouldNotBeNull();
 
         var roleId = (await RoleRepository.FindByNormalizedNameAsync(LookupNormalizer.NormalizeName("supporter"))).Id;
         var users = await UserRepository.GetUserIdListByRoleIdAsync(roleId);
-        users.Count.ShouldBe(2);
+        users.Count.ShouldBe(3);
+        users.ShouldContain(id => id == admin.Id);
         users.ShouldContain(id => id == john.Id);
         users.ShouldContain(id => id == neo.Id);
     }

modules/permission-management/src/Volo.Abp.PermissionManagement.Application.Contracts/Volo/Abp/PermissionManagement/PermissionGrantInfoDto.cs

@@ -15,4 +15,6 @@ public class PermissionGrantInfoDto
     public List<string> AllowedProviders { get; set; }
 
     public List<ProviderInfoDto> GrantedProviders { get; set; }
+
+    public bool IsEditable { get; set; }
 }

modules/permission-management/src/Volo.Abp.PermissionManagement.Application/Volo/Abp/PermissionManagement/PermissionAppService.cs

@@ -128,9 +128,42 @@ public class PermissionAppService : ApplicationService, IPermissionAppService
             }
         }
 
+        // Filter permissions for non-admin users: only show permissions they have or that are already granted
+        await FilterOutputPermissionsByCurrentUserAsync(result);
+
         return result;
     }
 
+    protected virtual async Task FilterOutputPermissionsByCurrentUserAsync(GetPermissionListResultDto result)
+    {
+        // Collect all permission names
+        var allPermissionNames = result.Groups
+            .SelectMany(g => g.Permissions)
+            .Select(p => p.Name)
+            .ToArray();
+
+        if (!allPermissionNames.Any())
+        {
+            return;
+        }
+
+        // Check which permissions current user has
+        var currentUserPermissions = await PermissionChecker.IsGrantedAsync(allPermissionNames);
+        var grantedPermissionNames = currentUserPermissions.Result
+            .Where(x => x.Value == PermissionGrantResult.Granted)
+            .Select(x => x.Key)
+            .ToHashSet();
+
+        // Mark editability: users can only edit permissions they currently have
+        foreach (var group in result.Groups)
+        {
+            foreach (var permission in group.Permissions)
+            {
+                permission.IsEditable = grantedPermissionNames.Contains(permission.Name);
+            }
+        }
+    }
+
     protected virtual PermissionGrantInfoDto CreatePermissionGrantInfoDto(PermissionDefinition permission)
     {
         return new PermissionGrantInfoDto
@@ -139,7 +172,8 @@ public class PermissionAppService : ApplicationService, IPermissionAppService
             DisplayName = permission.DisplayName?.Localize(StringLocalizerFactory),
             ParentName = permission.Parent?.Name,
             AllowedProviders = permission.Providers,
-            GrantedProviders = new List<ProviderInfoDto>()
+            GrantedProviders = new List<ProviderInfoDto>(),
+            IsEditable = true
         };
     }
 
@@ -162,6 +196,7 @@ public class PermissionAppService : ApplicationService, IPermissionAppService
     public virtual async Task UpdateAsync(string providerName, string providerKey, UpdatePermissionsDto input)
     {
         await CheckProviderPolicy(providerName);
+        await FilterInputPermissionsByCurrentUserAsync(input);
 
         foreach (var permissionDto in input.Permissions)
         {
@@ -379,4 +414,15 @@ public class PermissionAppService : ApplicationService, IPermissionAppService
 
         await AuthorizationService.CheckAsync(policyName);
     }
+
+    protected virtual async Task FilterInputPermissionsByCurrentUserAsync(UpdatePermissionsDto input)
+    {
+        var currentUserPermissions = await PermissionChecker.IsGrantedAsync(input.Permissions.Select(p => p.Name).ToArray());
+        var grantedPermissions = currentUserPermissions.Result
+            .Where(x => x.Value == PermissionGrantResult.Granted)
+            .Select(x => x.Key)
+            .ToHashSet();
+
+        input.Permissions = input.Permissions.Where(x => grantedPermissions.Contains(x.Name)).ToArray();
+    }
 }

modules/permission-management/src/Volo.Abp.PermissionManagement.Web/Pages/AbpPermissionManagement/PermissionManagementModal.cshtml.cs

@@ -137,7 +137,7 @@ public class PermissionManagementModal : AbpPageModel
         {
             var grantedProviders = Permissions.SelectMany(x => x.GrantedProviders);
 
-            return Permissions.All(x => x.IsGranted) && grantedProviders.All(p => p.ProviderName != currentProviderName);
+            return Permissions.All(x => x.IsGranted && x.IsGranted) && grantedProviders.All(p => p.ProviderName != currentProviderName);
         }
     }
 
@@ -159,9 +159,11 @@ public class PermissionManagementModal : AbpPageModel
 
         public List<ProviderInfoViewModel> GrantedProviders { get; set; }
 
+        public bool IsEditable { get; set; }
+
         public bool IsDisabled(string currentProviderName)
         {
-            return IsGranted && GrantedProviders.All(p => p.ProviderName != currentProviderName);
+            return IsEditable && IsGranted && GrantedProviders.All(p => p.ProviderName != currentProviderName);
         }
 
         public string GetShownName(string currentProviderName)
@@ -171,13 +173,19 @@ public class PermissionManagementModal : AbpPageModel
                 return DisplayName;
             }
 
+            var grantedByOtherProviders = GrantedProviders
+                .Where(p => p.ProviderName != currentProviderName)
+                .ToList();
+
+            if (!grantedByOtherProviders.Any())
+            {
+                return DisplayName;
+            }
+
             return string.Format(
                 "{0} ({1})",
                 DisplayName,
-                GrantedProviders
+                grantedByOtherProviders.JoinAsString(", ")
-                    .Where(p => p.ProviderName != currentProviderName)
-                    .Select(p => p.ProviderName)
-                    .JoinAsString(", ")
             );
         }
     }

modules/permission-management/test/Volo.Abp.PermissionManagement.Application.Tests/Volo/Abp/PermissionManagement/AbpPermissionManagementApplicationTestBase.cs

@@ -2,7 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using NSubstitute;
+using Volo.Abp.Authorization.Permissions;
 using Volo.Abp.Users;
 
 namespace Volo.Abp.PermissionManagement;
@@ -22,5 +24,9 @@ public class AbpPermissionManagementApplicationTestBase : PermissionManagementTe
         currentUser.IsAuthenticated.Returns(true);
 
         services.AddSingleton(currentUser);
+
+        var fakePermissionChecker = new FakePermissionChecker();
+        services.AddSingleton(fakePermissionChecker);
+        services.Replace(ServiceDescriptor.Singleton<IPermissionChecker>(fakePermissionChecker));
     }
 }

modules/permission-management/test/Volo.Abp.PermissionManagement.Application.Tests/Volo/Abp/PermissionManagement/FakePermissionChecker.cs

@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+using System.Security.Claims;
+using System.Threading.Tasks;
+using Volo.Abp.Authorization.Permissions;
+
+namespace Volo.Abp.PermissionManagement;
+
+public class FakePermissionChecker : IPermissionChecker
+{
+    private HashSet<string>? _grantedPermissions;
+
+    public void GrantAllPermissions()
+    {
+        _grantedPermissions = null;
+    }
+
+    public void SetGrantedPermissions(params string[] permissions)
+    {
+        _grantedPermissions = new HashSet<string>(permissions);
+    }
+
+    private bool IsGranted(string name)
+    {
+        return _grantedPermissions == null || _grantedPermissions.Contains(name);
+    }
+
+    public Task<bool> IsGrantedAsync(string name)
+    {
+        return Task.FromResult(IsGranted(name));
+    }
+
+    public Task<bool> IsGrantedAsync(ClaimsPrincipal? claimsPrincipal, string name)
+    {
+        return Task.FromResult(IsGranted(name));
+    }
+
+    public Task<MultiplePermissionGrantResult> IsGrantedAsync(string[] names)
+    {
+        return IsGrantedAsync(null, names);
+    }
+
+    public Task<MultiplePermissionGrantResult> IsGrantedAsync(ClaimsPrincipal? claimsPrincipal, string[] names)
+    {
+        var result = new MultiplePermissionGrantResult();
+        foreach (var name in names)
+        {
+            result.Result[name] = IsGranted(name)
+                ? PermissionGrantResult.Granted
+                : PermissionGrantResult.Undefined;
+        }
+        return Task.FromResult(result);
+    }
+}

modules/permission-management/test/Volo.Abp.PermissionManagement.Application.Tests/Volo/Abp/PermissionManagement/PermissionAppService_Tests.cs

@@ -16,12 +16,14 @@ public class PermissionAppService_Tests : AbpPermissionManagementApplicationTest
     private readonly IPermissionAppService _permissionAppService;
     private readonly IPermissionGrantRepository _permissionGrantRepository;
     private readonly ICurrentPrincipalAccessor _currentPrincipalAccessor;
+    private readonly FakePermissionChecker _fakePermissionChecker;
 
     public PermissionAppService_Tests()
     {
         _permissionAppService = GetRequiredService<IPermissionAppService>();
         _permissionGrantRepository = GetRequiredService<IPermissionGrantRepository>();
         _currentPrincipalAccessor = GetRequiredService<ICurrentPrincipalAccessor>();
+        _fakePermissionChecker = GetRequiredService<FakePermissionChecker>();
     }
 
     [Fact]
@@ -135,4 +137,81 @@ public class PermissionAppService_Tests : AbpPermissionManagementApplicationTest
         (await _permissionGrantRepository.FindAsync("MyPermission1", "Test",
             "Test")).ShouldBeNull();
     }
+
+    [Fact]
+    public async Task Get_Should_Mark_Permissions_As_Non_Editable_When_Current_User_Does_Not_Have_Them()
+    {
+        // Current user only has MyPermission1 and MyPermission2
+        _fakePermissionChecker.SetGrantedPermissions("MyPermission1", "MyPermission2");
+
+        var result = await _permissionAppService.GetAsync(
+            UserPermissionValueProvider.ProviderName,
+            PermissionTestDataBuilder.User1Id.ToString());
+
+        var testGroup = result.Groups.FirstOrDefault(g => g.Name == "TestGroup");
+        testGroup.ShouldNotBeNull();
+
+        // Permissions the current user has -> IsEditable = true
+        testGroup.Permissions.First(p => p.Name == "MyPermission1").IsEditable.ShouldBeTrue();
+        testGroup.Permissions.First(p => p.Name == "MyPermission2").IsEditable.ShouldBeTrue();
+
+        // Permissions the current user does NOT have -> IsEditable = false
+        testGroup.Permissions.First(p => p.Name == "MyPermission2.ChildPermission1").IsEditable.ShouldBeFalse();
+        testGroup.Permissions.First(p => p.Name == "MyPermission3").IsEditable.ShouldBeFalse();
+        testGroup.Permissions.First(p => p.Name == "MyPermission4").IsEditable.ShouldBeFalse();
+        testGroup.Permissions.First(p => p.Name == "MyPermission6").IsEditable.ShouldBeFalse();
+        testGroup.Permissions.First(p => p.Name == "MyPermission6.ChildPermission2").IsEditable.ShouldBeFalse();
+    }
+
+    [Fact]
+    public async Task Update_Should_Not_Grant_Permission_That_Current_User_Does_Not_Have()
+    {
+        // Current user only has MyPermission1, NOT MyPermission2
+        _fakePermissionChecker.SetGrantedPermissions("MyPermission1");
+
+        // Try to grant both MyPermission1 and MyPermission2
+        await _permissionAppService.UpdateAsync("Test", "Test", new UpdatePermissionsDto()
+        {
+            Permissions = new UpdatePermissionDto[]
+            {
+                new UpdatePermissionDto() { IsGranted = true, Name = "MyPermission1" },
+                new UpdatePermissionDto() { IsGranted = true, Name = "MyPermission2" }
+            }
+        });
+
+        // MyPermission1 should be granted (current user has it)
+        (await _permissionGrantRepository.FindAsync("MyPermission1", "Test", "Test")).ShouldNotBeNull();
+
+        // MyPermission2 should NOT be granted (current user doesn't have it, filtered out)
+        (await _permissionGrantRepository.FindAsync("MyPermission2", "Test", "Test")).ShouldBeNull();
+    }
+
+    [Fact]
+    public async Task Update_Should_Not_Revoke_Permission_That_Current_User_Does_Not_Have()
+    {
+        // First, grant both permissions
+        await _permissionGrantRepository.InsertAsync(
+            new PermissionGrant(Guid.NewGuid(), "MyPermission1", "Test", "Test"));
+        await _permissionGrantRepository.InsertAsync(
+            new PermissionGrant(Guid.NewGuid(), "MyPermission2", "Test", "Test"));
+
+        // Current user only has MyPermission1, NOT MyPermission2
+        _fakePermissionChecker.SetGrantedPermissions("MyPermission1");
+
+        // Try to revoke both
+        await _permissionAppService.UpdateAsync("Test", "Test", new UpdatePermissionsDto()
+        {
+            Permissions = new UpdatePermissionDto[]
+            {
+                new UpdatePermissionDto() { IsGranted = false, Name = "MyPermission1" },
+                new UpdatePermissionDto() { IsGranted = false, Name = "MyPermission2" }
+            }
+        });
+
+        // MyPermission1 should be revoked (current user has it)
+        (await _permissionGrantRepository.FindAsync("MyPermission1", "Test", "Test")).ShouldBeNull();
+
+        // MyPermission2 should still be granted (current user doesn't have it, revoke filtered out)
+        (await _permissionGrantRepository.FindAsync("MyPermission2", "Test", "Test")).ShouldNotBeNull();
+    }
 }