Multiple cross-site request forgery (CSRF) vulnerabilities in mvnForum before 1.2.1 GA allow remote attackers to (1) create forums, (2) change account privileges, (3) enable accounts, or (4) disable accounts as a product administrator via unspecified vectors, possibly related to HTTP Referer headers.

Cross-site scripting (XSS) vulnerability in the listonlineusers (aka "Who's online") component in mvnForum before 1.2.1 GA allows remote attackers to inject arbitrary web script or HTML via unspecified parameters.

Cross-site scripting (XSS) vulnerability in mvnForum 1.1 GA allows remote authenticated users to inject arbitrary web script or HTML via the topic field, which is later displayed by user/viewthread.jsp through use of the "quick reply button."