WordPress · Wpforo Forum · CVE-2026-28556
**Name of the Vulnerable Software and Affected Versions**
wpForo Forum version 2.4.14
**Description**
An issue exists in wpForo Forum that allows authenticated subscribers to perform actions typically reserved for moderators. Specifically, attackers can move, merge, or split any forum topic using the `topic move`, `topic merge`, and `topic split` form action handlers. This is possible because of a missing authorization check. Attackers with a valid form nonce can reorganize forum content, including moving topics to private forums, without appropriate permissions.
**Recommendations**
Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider restricting access to the `topic move`, `topic merge`, and `topic split` form action handlers.