DISPUTED Multiple SQL injection vulnerabilities in MyBB (aka MyBulletinBoard) before 1.6.1 allow remote attackers to execute arbitrary SQL commands via the keywords parameter in a (1) dosearch action to search.php or (2) dostuff action to private.php. NOTE: the vendor disputes this issue, saying "Although this doesn't lead to an SQL injection, it does provide a general MyBB SQL error."

SQL injection vulnerability in pages.php in Custom Pages 1.0 plugin for MyBulletinBoard (MyBB) allows remote attackers to execute arbitrary SQL commands via the page parameter.

MyBB (aka MyBulletinBoard) 1.4.3 includes the sensitive mypostkey parameter in URLs to moderation.php with the (1) mergeposts, (2) split, and (3) deleteposts actions, which allows remote attackers to steal the token and bypass the cross-site request forgery (CSRF) protection mechanism to hijack the authentication of moderators by reading the token from the HTTP Referer header.

Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, when changing the user avatar from the gallery, allows remote authenticated users to determine the existence of files via directory traversal sequences in the avatar and possibly the gallery parameters, related to (1) admin/modules/user/users.php and (2) usercp.php.

inc/functionstime.php in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, allows remote attackers to cause a denial of service (CPU consumption) via a crafted request with a large year value, which triggers a long loop, as reachable through member.php and possibly other vectors.

Cross-site scripting (XSS) vulnerability in myps.php in MyBB (aka MyBulletinBoard) 1.4.10 allows remote attackers to inject arbitrary web script or HTML via the username parameter in a donate action.