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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (24.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-12466: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

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.