CVE-2026-45129

MediumCVSS 4.6/10Last modified Sep 8, 2026

Description

MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP Recovery Codes module does not validate requests correctly, allowing same-site attackers to rotate a victim administrator's recovery codes with a specially crafted URL. The Admin CP Home, Preferences, Recovery Codes action=recovery_codes page regenerates Two-Factor Authentication recovery codes in mybb_adminoptions.recovery_codes on GET requests without request forgery protection. The uniquely identifying implementation details include admin/modules/home/preferences.php. This issue is fixed in version 1.8.40.

Metrics

CVSS 3.1 4.6/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

Weakness enumeration

CWE-352

Affected software

No affected versions have been published.

Timeline

Published: Aug 18, 2026
Last modified: Sep 8, 2026
NVD status: Deferred

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