What’s Vulnerable › Vulnerabilities

CVE-2025-68129: Auth0-PHP SDK has Improper Audience Validation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-17 · updated 2026-09-30
• Weakness: CWE-863

Description

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-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

How to fix

Upgrade to a fixed version: auth0-PHP 8.18.0; auth0 laravel-auth0 7.20.0; auth0 symfony 5.6.0; auth0 Wp-Auth0 5.5.0. Check the vendor advisory for mitigations.

References

• https://github.com/auth0/auth0-PHP/commit/7fe700053aee609718460c123f00f53c511f0f7f
• https://github.com/auth0/auth0-PHP/releases/tag/8.18.0
• https://github.com/auth0/auth0-PHP/security/advisories/GHSA-j2vm-wrq3-f7gf
• https://github.com/auth0/laravel-auth0/commit/a1c3344dc0e5a36e8f56c8cfc535728d3d7558f3
• https://github.com/auth0/laravel-auth0/releases/tag/7.20.0
• https://github.com/auth0/laravel-auth0/security/advisories/GHSA-7hh9-gp72-wh7h
• https://github.com/auth0/symfony/commit/0103d6f8dcef6996653fad1f823d1c167f472479
• https://github.com/auth0/symfony/releases/tag/5.6.0
• https://github.com/auth0/symfony/security/advisories/GHSA-f3r2-88mq-9v4g
• https://github.com/auth0/wordpress/commit/b207c6f7fd06507b90c4e6bcc18a857ef9e018de
• https://github.com/auth0/wordpress/releases/tag/5.5.0
• https://github.com/auth0/wordpress/security/advisories/GHSA-vvg7-8rmq-92g7

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