CVE-2025-68129: AUTH0 AUTH0-PHP

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

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. In applications built with the Auth0-PHP SDK, the audience validation in access tokens is performed improperly. Without proper validation, affected applications may accept ID tokens as Access tokens. Projects are affected if they use Auth0-PHP SDK versions between v8.0.0 and v8.17.0, or applications using the following SDKs that rely on the Auth0-PHP SDK versions between v8.0.0 and v8.17.0: Auth0/symfony versions between 5.0.0 and 5.5.0, Auth0/laravel-auth0 versions between 7.0.0 and 7.19.0, and/or Auth0/wordpress plugin versions between 5.0.0-BETA0 and 5.4.0. Auth0/Auth0-PHP version 8.18.0 contains a patch for the issue.

Affected products

• AUTH0 AUTH0-PHP: from 8.0.0, before 8.18.0 (fixed in 8.18.0)
• AUTH0 Laravel-AUTH0: from 7.0.0, before 7.20.0 (fixed in 7.20.0)
• AUTH0 Symfony: from 5.0.0, before 5.6.0 (fixed in 5.6.0)
• AUTH0 Wp-AUTH0: from 5.0.0, before 5.5.0 (fixed in 5.5.0)

Published 2025-12-17. Last modified 2026-09-30.