[PersianHacker.NET 200503-08] YaBB2 rc1 XSS Vulnerability Date: 2005 March Bug Number: 08 bid:12756 YaBB is a leading free forum software package that rivals any professional message board out there. It provides a real-time chat and support system for your visitors. More info @: http://www.yabbforum.com/ Discussion: -------------------- XSS Vulnerability in 'usersrecentposts' that may allow a remote user to launch cross-site scripting attacks. This issue could permit a remote attacker to create a malicious URI link that includes hostile HTML and script code. If this link were to be followed, the hostile code may be rendered in the web browser of the victim user. This would occur in the security context of the affected Web site and may allow for theft of cookie- based authentication credentials or other attacks. This vulnerability is reported to exist in YaBB2 rc1, other versions might also be affected. Exploit: -------------------- http://www.example.com/YaBB.pl?action=usersrecentposts;username=<%252FIFRAME> Solution: -------------------- no solution at this time. Credit: -------------------- Discovered by PersianHacker.NET Security Team by Alireza Hassani (trueend5 yahoo com) http://www.PersianHacker.NET Help -------------------- Read our whitepaper about XSS Vulnerability (only in FARSI language): http://www.persianhacker.net/articles/article-2322.html visit: http://www.PersianHacker.NET or mail me @: trueend5 yahoo com & 2 iranians all around the world: Happy 4shanbesoori and Happy New Year