For further information, please read the following bulletins:
TYPO3 Security Bulletin TYPO3-20081222-1: SQL injection vulnerability in extension "phpMyAdmin" (phpmyadmin):
http://typo3.org/teams/security/security-bulletins/typo3-20081222-1/
TYPO3 Security Bulletin TYPO3-20081222-2: Multiple vulnerabilities in extension "WEC Discussion Forum" (wec_discussion):
http://typo3.org/teams/security/security-bulletins/typo3-20081222-2/
TYPO3 Security Bulletin TYPO3-20081222-3: Cross-Site Scripting vulnerability in extension "DR Wiki - Typo3 Wiki extension" (dr_wiki):
http://typo3.org/teams/security/security-bulletins/typo3-20081222-3/
TYPO3 Collective Security Bulletin TYPO3-20081222-4: Several vulnerabilities in third party extension:
http://typo3.org/teams/security/security-bulletins/typo3-20081222-4/
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