CVEvulnerability

CVE-2026-45121

4.3 MEDIUM Published 2026-08-18 Modified 2026-09-08 Official page ↗
Status
Deferred
Published
2026-08-18
Last modified
2026-09-08
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-863

Description

MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not check permissions consistently when listing calendars, allowing authenticated users to access titles of calendars that are otherwise inaccessible. The affected calendar-selection paths in calendar.php perform permission checks against an invalid calendar context before returning calendar titles. The uniquely identifying implementation details include titles of inaccessible calendars, and invalid calendar permission context. This issue is fixed in version 1.8.40.

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References