diff --git a/apps/server/package.json b/apps/server/package.json
index d77bd1b7..c6f3fbee 100644
--- a/apps/server/package.json
+++ b/apps/server/package.json
@@ -28,6 +28,7 @@
   "dependencies": {
     "@aws-sdk/client-s3": "^3.456.0",
     "@aws-sdk/s3-request-presigner": "^3.456.0",
+    "@casl/ability": "^6.7.0",
     "@fastify/multipart": "^8.1.0",
     "@fastify/static": "^6.12.0",
     "@nestjs/common": "^10.3.0",
diff --git a/apps/server/src/core/casl/abilities/casl-ability.factory.ts b/apps/server/src/core/casl/abilities/casl-ability.factory.ts
new file mode 100644
index 00000000..b36b8351
--- /dev/null
+++ b/apps/server/src/core/casl/abilities/casl-ability.factory.ts
@@ -0,0 +1,90 @@
+import { Injectable } from '@nestjs/common';
+import {
+  AbilityBuilder,
+  createMongoAbility,
+  ExtractSubjectType,
+  InferSubjects,
+  MongoAbility,
+} from '@casl/ability';
+import { User } from '../../user/entities/user.entity';
+import { Action } from '../ability.action';
+import { Workspace } from '../../workspace/entities/workspace.entity';
+import { WorkspaceUser } from '../../workspace/entities/workspace-user.entity';
+import { WorkspaceInvitation } from '../../workspace/entities/workspace-invitation.entity';
+import { Role } from '../../../helpers/types/permission';
+import { Group } from '../../group/entities/group.entity';
+import { GroupUser } from '../../group/entities/group-user.entity';
+import { Attachment } from '../../attachment/entities/attachment.entity';
+import { Space } from '../../space/entities/space.entity';
+import { SpaceUser } from '../../space/entities/space-user.entity';
+import { Page } from '../../page/entities/page.entity';
+import { Comment } from '../../comment/entities/comment.entity';
+
+export type Subjects =
+  | InferSubjects<
+      | typeof Workspace
+      | typeof WorkspaceUser
+      | typeof WorkspaceInvitation
+      | typeof Space
+      | typeof SpaceUser
+      | typeof Group
+      | typeof GroupUser
+      | typeof Attachment
+      | typeof Comment
+      | typeof Page
+      | typeof User
+    >
+  | 'all';
+export type AppAbility = MongoAbility<[Action, Subjects]>;
+
+@Injectable()
+export default class CaslAbilityFactory {
+  createForWorkspace(user: User, workspace: Workspace) {
+    const { can, build } = new AbilityBuilder<AppAbility>(createMongoAbility);
+
+    const userRole = workspace?.workspaceUser.role;
+    console.log(userRole);
+
+    if (userRole === Role.OWNER) {
+      // Workspace Users
+      can<any>([Action.Manage], Workspace);
+      can<any>([Action.Manage], WorkspaceUser);
+      can<any>([Action.Manage], WorkspaceInvitation);
+
+      // Groups
+      can<any>([Action.Manage], Group);
+      can<any>([Action.Manage], GroupUser);
+
+      // Attachments
+      can<any>([Action.Manage], Attachment);
+    }
+
+    if (userRole === Role.MEMBER) {
+      can<any>([Action.Read], WorkspaceUser);
+
+      // Groups
+      can<any>([Action.Read], Group);
+      can<any>([Action.Read], GroupUser);
+
+      // Attachments
+      can<any>([Action.Read, Action.Create], Attachment);
+    }
+
+    return build({
+      detectSubjectType: (item) =>
+        item.constructor as ExtractSubjectType<Subjects>,
+    });
+  }
+
+  createForUser(user: User) {
+    const { can, build } = new AbilityBuilder<AppAbility>(createMongoAbility);
+
+    can<any>([Action.Manage], User, { id: user.id });
+    can<any>([Action.Read], User);
+
+    return build({
+      detectSubjectType: (item) =>
+        item.constructor as ExtractSubjectType<Subjects>,
+    });
+  }
+}
diff --git a/apps/server/src/core/casl/ability.action.ts b/apps/server/src/core/casl/ability.action.ts
new file mode 100644
index 00000000..b398b218
--- /dev/null
+++ b/apps/server/src/core/casl/ability.action.ts
@@ -0,0 +1,7 @@
+export enum Action {
+  Manage = 'manage',
+  Create = 'create',
+  Read = 'read',
+  Update = 'update',
+  Delete = 'delete',
+}
diff --git a/apps/server/src/core/casl/casl.module.ts b/apps/server/src/core/casl/casl.module.ts
new file mode 100644
index 00000000..2aeaff65
--- /dev/null
+++ b/apps/server/src/core/casl/casl.module.ts
@@ -0,0 +1,9 @@
+import { Global, Module } from '@nestjs/common';
+import CaslAbilityFactory from './abilities/casl-ability.factory';
+
+@Global()
+@Module({
+  providers: [CaslAbilityFactory],
+  exports: [CaslAbilityFactory],
+})
+export class CaslModule {}
diff --git a/apps/server/src/core/casl/decorators/policies.decorator.ts b/apps/server/src/core/casl/decorators/policies.decorator.ts
new file mode 100644
index 00000000..73286636
--- /dev/null
+++ b/apps/server/src/core/casl/decorators/policies.decorator.ts
@@ -0,0 +1,6 @@
+import { PolicyHandler } from '../interfaces/policy-handler.interface';
+import { SetMetadata } from '@nestjs/common';
+
+export const CHECK_POLICIES_KEY = 'check_policy';
+export const CheckPolicies = (...handlers: PolicyHandler[]) =>
+  SetMetadata(CHECK_POLICIES_KEY, handlers);
diff --git a/apps/server/src/core/casl/guards/policies.guard.ts b/apps/server/src/core/casl/guards/policies.guard.ts
new file mode 100644
index 00000000..62151600
--- /dev/null
+++ b/apps/server/src/core/casl/guards/policies.guard.ts
@@ -0,0 +1,40 @@
+import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import CaslAbilityFactory, {
+  AppAbility,
+} from '../abilities/casl-ability.factory';
+import { PolicyHandler } from '../interfaces/policy-handler.interface';
+import { CHECK_POLICIES_KEY } from '../decorators/policies.decorator';
+
+@Injectable()
+export class PoliciesGuard implements CanActivate {
+  constructor(
+    private reflector: Reflector,
+    private caslAbilityFactory: CaslAbilityFactory,
+  ) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const policyHandlers =
+      this.reflector.get<PolicyHandler[]>(
+        CHECK_POLICIES_KEY,
+        context.getHandler(),
+      ) || [];
+
+    const request = context.switchToHttp().getRequest();
+    const user = request['user'].user;
+    const workspace = request['user'].workspace;
+
+    const ability = this.caslAbilityFactory.createForWorkspace(user, workspace);
+
+    return policyHandlers.every((handler) =>
+      this.execPolicyHandler(handler, ability),
+    );
+  }
+
+  private execPolicyHandler(handler: PolicyHandler, ability: AppAbility) {
+    if (typeof handler === 'function') {
+      return handler(ability);
+    }
+    return handler.handle(ability);
+  }
+}
diff --git a/apps/server/src/core/casl/interfaces/policy-handler.interface.ts b/apps/server/src/core/casl/interfaces/policy-handler.interface.ts
new file mode 100644
index 00000000..4b33d571
--- /dev/null
+++ b/apps/server/src/core/casl/interfaces/policy-handler.interface.ts
@@ -0,0 +1,9 @@
+import { AppAbility } from '../abilities/casl-ability.factory';
+
+interface IPolicyHandler {
+  handle(ability: AppAbility): boolean;
+}
+
+type PolicyHandlerCallback = (ability: AppAbility) => boolean;
+
+export type PolicyHandler = IPolicyHandler | PolicyHandlerCallback;
diff --git a/apps/server/src/core/core.module.ts b/apps/server/src/core/core.module.ts
index c8319c89..75eb0312 100644
--- a/apps/server/src/core/core.module.ts
+++ b/apps/server/src/core/core.module.ts
@@ -10,6 +10,7 @@ import { CommentModule } from './comment/comment.module';
 import { SearchModule } from './search/search.module';
 import { SpaceModule } from './space/space.module';
 import { GroupModule } from './group/group.module';
+import { CaslModule } from './casl/casl.module';
 
 @Module({
   imports: [
@@ -25,6 +26,7 @@ import { GroupModule } from './group/group.module';
     SearchModule,
     SpaceModule,
     GroupModule,
+    CaslModule,
   ],
 })
 export class CoreModule {}
diff --git a/apps/server/src/core/group/group.controller.ts b/apps/server/src/core/group/group.controller.ts
index b8535020..c48fbd49 100644
--- a/apps/server/src/core/group/group.controller.ts
+++ b/apps/server/src/core/group/group.controller.ts
@@ -19,6 +19,12 @@ import { PaginationOptions } from '../../helpers/pagination/pagination-options';
 import { AddGroupUserDto } from './dto/add-group-user.dto';
 import { RemoveGroupUserDto } from './dto/remove-group-user.dto';
 import { UpdateGroupDto } from './dto/update-group.dto';
+import { Action } from '../casl/ability.action';
+import { Group } from './entities/group.entity';
+import { GroupUser } from './entities/group-user.entity';
+import { PoliciesGuard } from '../casl/guards/policies.guard';
+import { CheckPolicies } from '../casl/decorators/policies.decorator';
+import { AppAbility } from '../casl/abilities/casl-ability.factory';
 
 @UseGuards(JwtGuard)
 @Controller('groups')
@@ -38,6 +44,8 @@ export class GroupController {
     return this.groupService.getGroupsInWorkspace(workspace.id, pagination);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Read, Group))
   @HttpCode(HttpStatus.OK)
   @Post('/details')
   getGroup(
@@ -48,6 +56,8 @@ export class GroupController {
     return this.groupService.getGroup(groupIdDto.groupId, workspace.id);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, Group))
   @HttpCode(HttpStatus.OK)
   @Post('create')
   createGroup(
@@ -58,6 +68,8 @@ export class GroupController {
     return this.groupService.createGroup(user, workspace.id, createGroupDto);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, Group))
   @HttpCode(HttpStatus.OK)
   @Post('update')
   updateGroup(
@@ -68,6 +80,8 @@ export class GroupController {
     return this.groupService.updateGroup(workspace.id, updateGroupDto);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Read, GroupUser))
   @HttpCode(HttpStatus.OK)
   @Post('members')
   getGroupMembers(
@@ -82,6 +96,8 @@ export class GroupController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, GroupUser))
   @HttpCode(HttpStatus.OK)
   @Post('members/add')
   addGroupMember(
@@ -96,6 +112,8 @@ export class GroupController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, GroupUser))
   @HttpCode(HttpStatus.OK)
   @Post('members/remove')
   removeGroupMember(
@@ -109,6 +127,8 @@ export class GroupController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, Group))
   @HttpCode(HttpStatus.OK)
   @Post('delete')
   deleteGroup(
diff --git a/apps/server/src/core/user/user.controller.ts b/apps/server/src/core/user/user.controller.ts
index 4037435d..67c177d6 100644
--- a/apps/server/src/core/user/user.controller.ts
+++ b/apps/server/src/core/user/user.controller.ts
@@ -1,6 +1,5 @@
 import {
   Controller,
-  Get,
   UseGuards,
   HttpCode,
   HttpStatus,
@@ -16,12 +15,12 @@ import { UpdateUserDto } from './dto/update-user.dto';
 import { AuthUser } from '../../decorators/auth-user.decorator';
 
 @UseGuards(JwtGuard)
-@Controller('user')
+@Controller('users')
 export class UserController {
   constructor(private readonly userService: UserService) {}
 
   @HttpCode(HttpStatus.OK)
-  @Get('me')
+  @Post('me')
   async getUser(@AuthUser() authUser: User) {
     const user: User = await this.userService.findById(authUser.id);
 
@@ -33,7 +32,7 @@ export class UserController {
   }
 
   @HttpCode(HttpStatus.OK)
-  @Get('info')
+  @Post('info')
   async getUserInfo(@AuthUser() user: User) {
     const data: { workspace: Workspace; user: User } =
       await this.userService.getUserInstance(user.id);
diff --git a/apps/server/src/core/user/user.service.ts b/apps/server/src/core/user/user.service.ts
index a29ecc62..51af6ee9 100644
--- a/apps/server/src/core/user/user.service.ts
+++ b/apps/server/src/core/user/user.service.ts
@@ -13,6 +13,12 @@ import { WorkspaceService } from '../workspace/services/workspace.service';
 import { DataSource, EntityManager } from 'typeorm';
 import { transactionWrapper } from '../../helpers/db.helper';
 import { CreateWorkspaceDto } from '../workspace/dto/create-workspace.dto';
+import { Workspace } from '../workspace/entities/workspace.entity';
+
+export type UserWithWorkspace = {
+  user: User;
+  workspace: Workspace;
+};
 
 @Injectable()
 export class UserService {
@@ -59,7 +65,7 @@ export class UserService {
     return user;
   }
 
-  async getUserInstance(userId: string) {
+  async getUserInstance(userId: string): Promise<UserWithWorkspace> {
     const user: User = await this.findById(userId);
 
     if (!user) {
diff --git a/apps/server/src/core/workspace/controllers/workspace.controller.ts b/apps/server/src/core/workspace/controllers/workspace.controller.ts
index 2e999b70..3d0e1689 100644
--- a/apps/server/src/core/workspace/controllers/workspace.controller.ts
+++ b/apps/server/src/core/workspace/controllers/workspace.controller.ts
@@ -26,6 +26,12 @@ import {
   InviteUserDto,
   RevokeInviteDto,
 } from '../dto/invitation.dto';
+import { Action } from '../../casl/ability.action';
+import { WorkspaceUser } from '../entities/workspace-user.entity';
+import { WorkspaceInvitation } from '../entities/workspace-invitation.entity';
+import { CheckPolicies } from '../../casl/decorators/policies.decorator';
+import { AppAbility } from '../../casl/abilities/casl-ability.factory';
+import { PoliciesGuard } from '../../casl/guards/policies.guard';
 
 @UseGuards(JwtGuard)
 @Controller('workspaces')
@@ -57,6 +63,8 @@ export class WorkspaceController {
   }
   */
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, Workspace))
   @HttpCode(HttpStatus.OK)
   @Post('update')
   async updateWorkspace(
@@ -66,12 +74,18 @@ export class WorkspaceController {
     return this.workspaceService.update(workspace.id, updateWorkspaceDto);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) => ability.can(Action.Manage, Workspace))
   @HttpCode(HttpStatus.OK)
   @Post('delete')
   async deleteWorkspace(@Body() deleteWorkspaceDto: DeleteWorkspaceDto) {
     return this.workspaceService.delete(deleteWorkspaceDto);
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) =>
+    ability.can(Action.Read, WorkspaceUser),
+  )
   @HttpCode(HttpStatus.OK)
   @Post('members')
   async getWorkspaceMembers(
@@ -85,6 +99,10 @@ export class WorkspaceController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) =>
+    ability.can(Action.Manage, WorkspaceUser),
+  )
   @HttpCode(HttpStatus.OK)
   @Post('members/add')
   async addWorkspaceMember(
@@ -98,6 +116,10 @@ export class WorkspaceController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) =>
+    ability.can(Action.Manage, WorkspaceUser),
+  )
   @HttpCode(HttpStatus.OK)
   @Post('members/remove')
   async removeWorkspaceMember(
@@ -110,6 +132,10 @@ export class WorkspaceController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) =>
+    ability.can(Action.Manage, WorkspaceUser),
+  )
   @HttpCode(HttpStatus.OK)
   @Post('members/role')
   async updateWorkspaceMemberRole(
@@ -124,6 +150,10 @@ export class WorkspaceController {
     );
   }
 
+  @UseGuards(PoliciesGuard)
+  @CheckPolicies((ability: AppAbility) =>
+    ability.can(Action.Manage, WorkspaceInvitation),
+  )
   @HttpCode(HttpStatus.OK)
   @Post('invite')
   async inviteUser(
diff --git a/apps/server/src/core/workspace/entities/workspace.entity.ts b/apps/server/src/core/workspace/entities/workspace.entity.ts
index a8e30e0f..d8911086 100644
--- a/apps/server/src/core/workspace/entities/workspace.entity.ts
+++ b/apps/server/src/core/workspace/entities/workspace.entity.ts
@@ -86,4 +86,6 @@ export class Workspace {
 
   @OneToMany(() => Group, (group) => group.workspace)
   groups: [];
+
+  workspaceUser?: WorkspaceUser;
 }
diff --git a/apps/server/src/core/workspace/services/workspace.service.ts b/apps/server/src/core/workspace/services/workspace.service.ts
index 53baab9a..6a8e5819 100644
--- a/apps/server/src/core/workspace/services/workspace.service.ts
+++ b/apps/server/src/core/workspace/services/workspace.service.ts
@@ -1,8 +1,4 @@
-import {
-  BadRequestException,
-  Injectable,
-  NotFoundException,
-} from '@nestjs/common';
+import { Injectable, NotFoundException } from '@nestjs/common';
 import { CreateWorkspaceDto } from '../dto/create-workspace.dto';
 import { WorkspaceRepository } from '../repositories/workspace.repository';
 import { WorkspaceUserRepository } from '../repositories/workspace-user.repository';
@@ -15,12 +11,10 @@ import { plainToInstance } from 'class-transformer';
 import { v4 as uuid } from 'uuid';
 import { UpdateWorkspaceDto } from '../dto/update-workspace.dto';
 import { DeleteWorkspaceDto } from '../dto/delete-workspace.dto';
-import { UpdateWorkspaceUserRoleDto } from '../dto/update-workspace-user-role.dto';
 import { SpaceService } from '../../space/space.service';
 import { PaginationOptions } from '../../../helpers/pagination/pagination-options';
 import { PaginationMetaDto } from '../../../helpers/pagination/pagination-meta-dto';
 import { PaginatedResult } from '../../../helpers/pagination/paginated-result';
-import { User } from '../../user/entities/user.entity';
 import { DataSource, EntityManager } from 'typeorm';
 import { transactionWrapper } from '../../../helpers/db.helper';
 import { CreateSpaceDto } from '../../space/dto/create-space.dto';
@@ -187,8 +181,8 @@ export class WorkspaceService {
 
   async getUserCurrentWorkspace(userId: string): Promise<Workspace> {
     const userWorkspace = await this.workspaceUserRepository.findOne({
-      where: { userId: userId },
       relations: ['workspace'],
+      where: { userId: userId },
       order: {
         createdAt: 'ASC',
       },
@@ -198,7 +192,8 @@ export class WorkspaceService {
       throw new NotFoundException('No workspace found for this user');
     }
 
-    return userWorkspace.workspace;
+    const { workspace, ...workspaceUser } = userWorkspace;
+    return { ...workspace, workspaceUser } as Workspace;
   }
 
   async getUserWorkspaces(
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a3322980..c268143d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -256,6 +256,9 @@ importers:
       '@aws-sdk/s3-request-presigner':
         specifier: ^3.456.0
         version: 3.485.0
+      '@casl/ability':
+        specifier: ^6.7.0
+        version: 6.7.0
       '@fastify/multipart':
         specifier: ^8.1.0
         version: 8.1.0
@@ -2379,6 +2382,12 @@ packages:
     resolution: {integrity: sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==}
     dev: true
 
+  /@casl/ability@6.7.0:
+    resolution: {integrity: sha512-NC51ha1nnfCMy88Gdk7cTBipv6n3QNo1yZA68EklsUIzWVDhTs9jJ5y70c3LpT6sN1GcUnGBP/cF7M2I4TkQ3w==}
+    dependencies:
+      '@ucast/mongo2js': 1.3.4
+    dev: false
+
   /@colors/colors@1.5.0:
     resolution: {integrity: sha512-ooWCrlZP11i8GImSjTHYHLkvFDP48nS4+204nGb1RiX/WXYHmJA2III9/e2DWVabCESdW7hBAEzHRqUn9OUVvQ==}
     engines: {node: '>=0.1.90'}
@@ -5394,6 +5403,30 @@ packages:
       eslint-visitor-keys: 3.4.3
     dev: true
 
+  /@ucast/core@1.10.2:
+    resolution: {integrity: sha512-ons5CwXZ/51wrUPfoduC+cO7AS1/wRb0ybpQJ9RrssossDxVy4t49QxWoWgfBDvVKsz9VXzBk9z0wqTdZ+Cq8g==}
+    dev: false
+
+  /@ucast/js@3.0.4:
+    resolution: {integrity: sha512-TgG1aIaCMdcaEyckOZKQozn1hazE0w90SVdlpIJ/er8xVumE11gYAtSbw/LBeUnA4fFnFWTcw3t6reqseeH/4Q==}
+    dependencies:
+      '@ucast/core': 1.10.2
+    dev: false
+
+  /@ucast/mongo2js@1.3.4:
+    resolution: {integrity: sha512-ahazOr1HtelA5AC1KZ9x0UwPMqqimvfmtSm/PRRSeKKeE5G2SCqTgwiNzO7i9jS8zA3dzXpKVPpXMkcYLnyItA==}
+    dependencies:
+      '@ucast/core': 1.10.2
+      '@ucast/js': 3.0.4
+      '@ucast/mongo': 2.4.3
+    dev: false
+
+  /@ucast/mongo@2.4.3:
+    resolution: {integrity: sha512-XcI8LclrHWP83H+7H2anGCEeDq0n+12FU2mXCTz6/Tva9/9ddK/iacvvhCyW6cijAAOILmt0tWplRyRhVyZLsA==}
+    dependencies:
+      '@ucast/core': 1.10.2
+    dev: false
+
   /@ungap/structured-clone@1.2.0:
     resolution: {integrity: sha512-zuVdFrMJiuCDQUMCzQaD6KL28MjnqqN8XnAqiEq9PNm/hCPTSGfrXCOfwj1ow4LFb/tNymJPwsNbVePc1xFqrQ==}
     dev: true