Yet Another Bulletin Board (YaBB) 1.40 and 1.41 does not require a user to submit the correct password before changing it to a new password, which allows remote attackers to modify passwords by stealing the cookie of another user, modifying the expiretime setting, and submitting the change in a profile2 action to index.php.

Cross-site scripting (XSS) vulnerability in index.php in Yet Another Bulletin Board (YaBB) 1.40 and 1.41 allows remote attackers to inject arbitrary web script or HTML via the password (passwrd) parameter.

Cross-site scripting (XSS) vulnerability in YaBB.pl in YaBB 1 GOLD SP 1.3.2 allows remote attackers to inject arbitrary web script or HTML via a hex-encoded to parameter. NOTE: some sources say that the board parameter is affected, but this is incorrect.

Cross-site request forgery (CSRF) vulnerability in YaBB 1 GOLD SP 1.3.2 allows remote attackers to perform unauthorized actions as the administrative user via a link or IMG tag to YaBB.pl that specifies the desired action, id, and moda parameters.

Interpretation conflict in YaBB before 2.1 allows remote authenticated users to inject arbitrary web script or HTML via HTML in a file with a GIF file extension, which causes the HTML to be executed by a victim who views the file in Internet Explorer as a result of CVE-2005-3312. NOTE: it could be argued that this vulnerability is due to a design flaw in Internet Explorer and the proper fix should be in that browser; if so, then this should not be treated as a vulnerability in YaBB.