CVE-2026-45121mediumCWE-863

CVE-2026-45121: fallo de gravedad media en mybb

MyBB: Insufficient permission check for calendar select

Publicada el

Seguir esta CVE+ Monitorear mybb

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 4.3epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Productos afectados
mybb · mybb
CVEs relacionadas — mybb

En el mismo producto, de las más peligrosas a las menos.

CVE-2022-24734HIGHRemote code execution in mybbEPSS 77.8%CVE-2022-39265HIGHMail settings' command parameter injection in mybbEPSS 3.1%CVE-2026-45117CRITICALMyBB: Installer database configuration RCEEPSS 1.1%CVE-2025-48940HIGHMyBB's upgrade component vulnerable to local file inclusionEPSS 0.6%CVE-2024-23335MEDIUMBackups directory .htaccess deletion in. MyBBEPSS 0.6%CVE-2026-45734MEDIUMMyBB: Default CAPTCHA missing invalidationEPSS 0.6%