# CVE-2021-36850: WordPress Media File Renamer – Auto & Manual Rename plugin <= 5.1.9 - Cross-Site Request Forgery (CSRF) vulnerability

> An attacker can trick users into modifying media file titles, names, and lock states via CSRF in the Media File Renamer plugin.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Oct 2021
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-pmfh-pxqg-pgf4

## What is CVE-2021-36850?

CVE-2021-36850 is a medium-severity vulnerability in Meow Apps Media File Renamer – Auto & Manual Rename (WordPress plugin), published on 4 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Cross-Site Request Forgery (CSRF) vulnerability in WordPress Media File Renamer – Auto & Manual Rename plugin (versions <= 5.1.9). Affected parameters "post_title", "filename", "lock". This allows changing the uploaded media title, media file name, and media locking state.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-36850?

It affects 1 product.


Products: Meowapps Media File Renamer - Auto \& Manual Rename.

## How do I fix CVE-2021-36850?

No fix has been published for CVE-2021-36850 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36850 being exploited?

There is no known exploitation of CVE-2021-36850 in the wild and no public exploit code.

## Other vulnerabilities in Meow Apps Media File Renamer – Auto & Manual Rename (WordPress plugin)

- [CVE-2023-44991](https://insights.sbomify.com/CVE-2023-44991/): WordPress Media File Renamer Plugin <= 5.6.9 is vulnerable to Sensitive Data Exposure (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-36850 and fix it if it is affected.

What it is: CVE-2021-36850 is a medium-severity vulnerability in Meow Apps Media File Renamer – Auto & Manual Rename (WordPress plugin), published on 4 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-36850 in the wild and no public exploit code.

Affected product: Meow Apps Media File Renamer – Auto & Manual Rename (WordPress plugin). 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-2021-36850/ (Markdown: https://insights.sbomify.com/CVE-2021-36850/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36850
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36850
- OSV: https://osv.dev/vulnerability/CVE-2021-36850

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-36850/
Summaries are generated and may contain mistakes; the official description above is the record.