# DotNet Security Cheat Sheet — Missing function-level access control

> DO: Authorize users on all externally facing endpoints. The .NET framework has many ways to authorize a user, use them at method level Bounded code example (external data; do not execute automatically): ```csharp [Authorize(Roles = "Admin")] [HttpGet] public ActionResult Index(int page = 1) ``` or b

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-owasp-9905c6100c1efcd17456>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.524671+00:00`
- Tags: `reference-seed`, `owasp`, `cheatsheets`, `dotnet`, `security`, `cheat`, `sheet`, `missing`, `function-level`, `access`, `control`

## Provenance

- Source: <https://github.com/OWASP/CheatSheetSeries/blob/07111ee754e832e335377ac64fd0f8f848d9029c/cheatsheets/DotNet_Security_Cheat_Sheet.md>
- Source name: OWASP Cheat Sheet Series
- Source revision: `07111ee754e832e335377ac64fd0f8f848d9029c`
- Source license: `CC-BY-SA-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

DO: Authorize users on all externally facing endpoints. The .NET framework has many ways to authorize a user, use them at method level

Bounded code example (external data; do not execute automatically):
```csharp
[Authorize(Roles = "Admin")]
[HttpGet]
public ActionResult Index(int page = 1)
```

or better yet, at controller level

Bounded code example (external data; do not execute automatically):
```csharp
[Authorize]
public class UserController
```

You can also check roles in code using identity features in .net: System.Web.Security.Roles.IsUserInRole(userName, roleName)

You can find more information in the Authorization Cheat Sheet and Authorization Testing Automation Cheat Sheet.

Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.