# CVE-2016-6336: Missing authorization in n/a

> Authenticated users with undelete permissions can bypass revision deletion restrictions to remove deletion status of arbitrary file revisions.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Apr 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-6336, GHSA-p684-q58j-rxcq

## What is CVE-2016-6336?

CVE-2016-6336 is a medium-severity missing authorization vulnerability in Mediawiki Mediawiki, published on 20 Apr 2017. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 allows remote authenticated users with undelete permissions to bypass intended suppressrevision and deleterevision restrictions and remove the revision deletion status of arbitrary file revisions by using Special:Undelete.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2016-6336?

It affects 1 product.


Products: Mediawiki Mediawiki.

## How do I fix CVE-2016-6336?

Upgrade to a fixed version.

## Is CVE-2016-6336 being exploited?

There is no known exploitation of CVE-2016-6336 in the wild and no public exploit code.

## Other vulnerabilities in Mediawiki Mediawiki

- [CVE-2023-37303](https://insights.sbomify.com/CVE-2023-37303/): Denial of service in n/a (critical 9.8)
- [CVE-2022-29904](https://insights.sbomify.com/CVE-2022-29904/): SQL injection in n/a (critical 9.8)
- [CVE-2022-29906](https://insights.sbomify.com/CVE-2022-29906/): Missing authorization in n/a (critical 9.8)
- [CVE-2022-28205](https://insights.sbomify.com/CVE-2022-28205/): Business logic in n/a (critical 9.8)
- [CVE-2022-28206](https://insights.sbomify.com/CVE-2022-28206/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-6336 and fix it if it is affected.

What it is: CVE-2016-6336 is a medium-severity missing authorization vulnerability in Mediawiki Mediawiki, published on 20 Apr 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-6336 in the wild and no public exploit code.

Affected product: Mediawiki Mediawiki. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2016-6336/ (Markdown: https://insights.sbomify.com/CVE-2016-6336/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-6336
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-6336
- OSV: https://osv.dev/vulnerability/CVE-2016-6336

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-6336/
Summaries are generated and may contain mistakes; the official description above is the record.