Secunia Security Advisory – Debian has issued an update for mediawiki. This fixes a vulnerability and a security issue, which can be exploited by malicious users to disclose sensitive information and bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/87619/sa39022.txt
Source: https://packetstormsecurity.com/files/87619/Secunia-Security-Advisory-39022.html