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.
CVSS 4.6EPSS 0.13899999999999998%Risk 0.47
View source- Published
- 2026-08-18 16:17:08
- Affected versions
- <1.8.40
- Type
- Web application
- Last modified
- 2026-08-18 19:16:50
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L