vBulletin versions 3.8.4, 3.7.6, and 3.6.12 suffer from a cross site scripting vulnerability.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/81883/vbulletin3-xss.txt
Source: https://packetstormsecurity.com/files/81883/vBulletin-3.8.4-3.7.6-3.6.12-Cross-Site-Scripting.html