medium4.6
CVE-2026-45129
MyBB is free and open source forum software.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| MyBB | MyBB Is Free And Open Source Forum Software. | before 1.8.40 |
Versions were read from the advisory text. No structured product data has been published for this record yet.