CVE-2026-45124
MediumCVSS 4.3Summary
MyBB before version 1.8.40 in the Mod CP Report Center does not check permissions consistently, allowing moderators without report-management permission to mark reports as resolved. The Mark Selected as Read handler is reachable with canmodcp even without canmanagereportedcontent or canmanagereportedposts, and when no forums are in scope, the UPDATE query executes without the expected permission-based limitation.
Risk Assessment
Moderators without proper permissions can manipulate report status, potentially leading to ignored reports or compromised moderation processes.
Recommendation
Update MyBB to version 1.8.40 or later, which includes a fix for permission checks in the Mod CP Report Center.
Original NVD description (English source)
MyBB is free and open source forum software. Prior to 1.8.40, the Mod CP Report Center does not check permissions consistently, allowing moderators without report-management permission to mark reports as resolved. The modcp.php?action=do_reports Mark Selected as Read handler is reachable with canmodcp even without canmanagereportedcontent or canmanagereportedposts. When no forums are in scope, $flist_reports is empty and the UPDATE mybb_reportedcontent query executes without the expected permission-based limitation. This issue is fixed in version 1.8.40.