CVE-2026-45120

5.4 Moyenne

Publiée le 18/08/2026 à 18:17 · Modifiée le 08/09/2026 à 23:02 · Analyse NVD reportée · Source : security-advisories@github.com

Description

MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not verify private event status consistently, allowing users with viewing and moderation permissions to access and moderate private events. The private-event check used by get_events() in inc/functions_calendar.php and the event action is missing from the remaining calendar.php actions, despite the limited-access behavior described in inc/languages/english/calendar.lang.php. This issue is fixed in version 1.8.40.

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Produits concernés

mybb

Scores CVSS

Version	Score	Source	Vecteur
3.1	5.4 Moyenne	security-advisories@github.com	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`

Faiblesses (CWE)

CWE-639

Références

https://github.com/mybb/mybb/commit/c077e6c29755187c4df78a1e674dd61bc55701b3
https://github.com/mybb/mybb/releases/tag/mybb_1840
https://github.com/mybb/mybb/security/advisories/GHSA-c2hm-g9w6-pv6x
https://mybb.com/versions/1.8.40

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories