An authorization bypass in b2evolution allows remote, unauthenticated attackers to predict password reset tokens for any user through the use of a bad randomness function. This allows the attacker to get valid sessions for arbitrary users, and optionally reset their password. Tested and confirmed in a default installation of version 7.2.3. Earlier versions are affected, possibly earlier major versions as well.

DISPUTED In b2evolution 7.2.5, if configured with adminscanmanipulatesensitivefiles, arbitrary file upload is allowed for admins, leading to command execution. NOTE: the vendor's position is that this is "very obviously a feature not an issue and if you don't like that feature it is very obvious how to disable it."

Reflected cross-site scripting vulnerability (XSS) in the evoadm.php file in b2evolution cms version 6.11.6-stable allows remote attackers to inject arbitrary webscript or HTML code via the tab3 parameter.

b2evolution CMS v7.2.3 was discovered to contain a Cross-Site Request Forgery (CSRF) via the User login page. This vulnerability allows attackers to escalate privileges.

b2evolution CMS v7.2.3 was discovered to contain a SQL injection vulnerability via the parameter cfqueryparam in the User login section. This vulnerability allows attackers to execute arbitrary code via a crafted input.