CVE-2026-58054 | MyBB up to 1.8.40 User verify_usergroup privileges management

June 28, 2026 Yanac

A vulnerability was found in MyBB up to 1.8.40 and classified as critical. This impacts the function verify_usergroup of the component User Module. Such manipulation leads to improper privilege management.

This vulnerability is traded as CVE-2026-58054. The attack may be launched remotely. Furthermore, there is an exploit available.VulDB Recent EntriesRead More