Flock 3 versions prior to 3.0.0.4094 suffer from a malformed favourite cross-origin bypass vulnerability.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/93859/FLOCK-SA-2010-01.txt
Source: https://packetstormsecurity.com/files/93859/Flock-3-Cross-Origin-Bypass.html