Security vulnerabilities have been discovered in third party TYPO3 extensions: "Photogallery" (ce_gallery), "SEO Photogallery by Evorion" (evgallery).
For further information on all CSB (Collective Security Bulletin) issues, please read the related advisory TYPO3-SA-2011-006 that was published today:
http://typo3.org/teams/security/security-bulletins/typo3-sa-2011-006/
In general the TYPO3 Security Team recommends to read the following pages:
- The TYPO3 Security Guide: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/Security/Index.html#security-guidelines
- Make sure you are subscribed to the TYPO3 Announce List: http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce
- See all TYPO3 security advisories