For further information, please read the following bulletins:
TYPO3 Security Bulletin TYPO3-20081110-1: Cross-Site Scripting vulnerability in extension phpMyAdmin (phpmyadmin):
http://typo3.org/teams/security/security-bulletins/typo3-20081110-1/
TYPO3 Collective Security Bulletin TYPO3-20081110-2: Several vulnerabilities in third party extensions:
http://typo3.org/teams/security/security-bulletins/typo3-20081110-2/
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