# Cross-Site-Request-Forgery in Backend

Advisory record · `GHSA-657m-v5vm-f6rw`

- **Identifiers:** `GHSA-657m-v5vm-f6rw` · `BIT-typo3-2021-41113` · `CVE-2021-41113` · `PKSA-146t-35pv-hv8w` · `PKSA-nh79-h7dz-v4t2`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-309](https://cwe.mitre.org/data/definitions/309.html) · [CWE-352](https://cwe.mitre.org/data/definitions/352.html)
- **Tags:** [Cross-site request forgery (CSRF)](https://agentprime.io/advisories/tag/csrf.md) · [CWE-309](https://agentprime.io/advisories/tag/cwe-309.md)
- **Published:** 5 Oct 2021
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 5 Oct 2021, 20:23 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `typo3/cms-core` (Packagist): affected `>=11.2.0, <11.5.0`; fixed in `11.5.0`
- `typo3/cms` (Packagist): affected `>=11.2.0, <11.5.0`; fixed in `11.5.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0064, the 51st percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 5 Oct 2021. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-657m-v5vm-f6rw](https://github.com/advisories/GHSA-657m-v5vm-f6rw)
- [OSV: GHSA-657m-v5vm-f6rw](https://osv.dev/vulnerability/GHSA-657m-v5vm-f6rw)
- <https://github.com/TYPO3/typo3/security/advisories/GHSA-657m-v5vm-f6rw>
- <https://nvd.nist.gov/vuln/detail/CVE-2020-11069>
- <https://nvd.nist.gov/vuln/detail/CVE-2021-41113>
- <https://github.com/TYPO3/typo3/commit/fa51999203c5e5d913ecae5ea843ccb2b95fa33f>
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-41113.yaml>
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-41113.yaml>
- <https://github.com/TYPO3/typo3>
- <https://typo3.org/security/advisory/typo3-core-sa-2020-006>
- <https://typo3.org/security/advisory/typo3-core-sa-2021-014>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-657m-v5vm-f6rw>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-657m-v5vm-f6rw/>. Everything for agents: <https://agentprime.io/llms.txt>.