CVE-2025-12466: Simple OAuth Project Simple OAuth

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Simple OAuth (OAuth2) & OpenID Connect allows Authentication Bypass.This issue affects Simple OAuth (OAuth2) & OpenID Connect: from 6.0.0 before 6.0.7.

Affected products

• Simple OAuth Project Simple OAuth: from 6.0.0, before 6.0.7 (fixed in 6.0.7)

Published 2025-10-30. Last modified 2026-10-08.