[TYPO3-announce] [Ticket#2025031810000011] Vulnerabilities in multiple third party TYPO3 CMS extensions

[TYPO3 Security Team]

Dear TYPO3 users,

several vulnerabilities have been found in the following third party TYPO3
extensions:

“Additional TCA” (additional_tca)
“[clickstorm] SEO” (cs_seo)

For further information on the issues, please read the related advisories
TYPO3-EXT-SA-2025-002 and TYPO3-EXT-SA-2025-003 which were published today:

TYPO3-EXT-SA-2025-002: Cross-Site Scripting in extension “Additional TCA”
(additional_tca)
[1]https://typo3.org/security/advisory/typo3-ext-sa-2025-002

TYPO3-EXT-SA-2025-003: Multiple vulnerabilities in extension “[clickstorm]
SEO” (cs_seo)
[2]https://typo3.org/security/advisory/typo3-ext-sa-2025-003

In general the TYPO3 Security Team recommends to read the following pages:

The TYPO3 Security Guide:
[3]https://docs.typo3.org/typo3cms/CoreApiReference/Security/Index.html

Make sure you are subscribed to the TYPO3 Announce List:
[4]https://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce

See all TYPO3 security advisories:
[5]https://typo3.org/help/security-advisories/

Best regards,

Torben Hansen
Member of the TYPO3 Security Team

--
TYPO3 Security Team homepage: [6]https://typo3.org/teams/security/

E-Mail: security at typo3.org

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[1] https://typo3.org/security/advisory/typo3-ext-sa-2025-002
[2] https://typo3.org/security/advisory/typo3-ext-sa-2025-003
[3] https://docs.typo3.org/typo3cms/CoreApiReference/Security/Index.html
[4] https://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce
[5] https://typo3.org/help/security-advisories/
[6] https://typo3.org/teams/security/