Debian has issued an update for typo3-src. This fixes multiple vulnerabilities, which can be exploited by malicious users to bypass certain security restrictions, conduct script insertion attacks, disclose system information, and delete arbitrary files and by malicious people to enumerate user accounts, bypass certain security restrictions, and conduct cross-site scripting attacks.

For more information:
SA45557

Solution
Apply updated packages via the apt-get package manager.
Original Advisory
DSA-2289-1:
http://www.debian.org/security/2011/dsa-2289

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers