PT-2026-77176 · Mybb · Mybb
CVE-2026-45122
·
Published
2026-08-18
·
Updated
2026-08-18
CVSS v3.1
4.3
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
MyBB versions prior to 1.8.40
Description
The calendar module fails to validate moderation permissions for the destination calendar during the event moving process. A user possessing moderation permissions for a source calendar can move an event to a target calendar for which they only have viewing permissions. This occurs because the
do move action in the calendar.php file does not verify the canmoderateevents permission for the destination calendar.Recommendations
Update to version 1.8.40.
Exploit
Fix
Incorrect Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
Mybb