Secunia Security Advisory – Debian has issued an update for gallery. This fixes a security issue, which can be exploited by malicious users to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41186/sa17367.txt
Source: https://packetstormsecurity.com/files/41186/Secunia-Security-Advisory-17367.html