Secunia Security Advisory – Some vulnerabilities have been discovered in phpBB, which can be exploited by malicious people to conduct cross-site request forgery attacks and cross-site scripting attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/52859/sa23283.txt
Source: https://packetstormsecurity.com/files/52859/Secunia-Security-Advisory-23283.html

