CVE-2026-45129

Published: Aug 18, 2026Modified: Sep 8, 2026Deferred

4.6

Vector

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

Exploitability: 2.1 / Impact: 2.5

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-352

Cross-Site Request Forgery (CSRF)

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

References (4)

https://github.com/mybb/mybb/commit/d2d9e47b53d85101cf25cb47e882bc7ba76355a4

Source: security-advisories@github.com

https://github.com/mybb/mybb/releases/tag/mybb_1840

Source: security-advisories@github.com

https://github.com/mybb/mybb/security/advisories/GHSA-75vg-6wgp-mcc9

Source: security-advisories@github.com

https://mybb.com/versions/1.8.40

Source: security-advisories@github.com

Timeline

No history available yet.