On Secunia.com, two new updates for the Debian linux distribution have been posted - on for PHP4 and the other for PHP5:

Debian has issued an update for php4/5. This fixes some vulnerabilities, which can be exploited by malicious people to conduct cross-site scripting attacks, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.

You can get more information and links to the downloads here:

• PHP4 announcement
• PHP5 announcement