Secunia Security Advisory – Dr_insane has reported some vulnerabilities in PostMaster, which can be exploited by malicious people to detect the presence of local files, enumerate usernames, conduct cross-site scripting attacks and bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/37614/sa15268.txt
Source: https://packetstormsecurity.com/files/37614/Secunia-Security-Advisory-15268.html