What is CVE-2025-12466?

CVE-2025-12466 is a high-severity vulnerability in Drupal Simple Oauth (Oauth2) & Openid Connect, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2025-10-30.

How severe is CVE-2025-12466?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Drupal Simple Oauth (Oauth2) & Openid Connect

CVE-2025-12466

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.

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Drupal Simple Oauth (Oauth2) & Openid Connect — versions 6.0.0
Simple_oauth_project Simple_oauth

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

mlhess@drupal.org (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-12466?: CVE-2025-12466 is a high-severity vulnerability in Drupal Simple Oauth (Oauth2) & Openid Connect, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2025-10-30.
How severe is CVE-2025-12466?: High severity. CVSS v3 base score is 7.5 out of 10.