CVE-2025-68129
Unknown Unknown - Not Provided
Improper Audience Validation in Auth0-PHP SDK Allows Token Misuse

Publication date: 2025-12-17

Last updated on: 2026-03-05

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2025-12-17
Last Modified
2026-03-05
Generated
2026-06-16
AI Q&A
2025-12-18
EPSS Evaluated
2026-06-15
NVD
CVE-2025-68129
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
auth0 auth0-php From 8.0.0 (inc) to 8.18.0 (exc)
auth0 laravel-auth0 From 7.0.0 (inc) to 7.20.0 (exc)
auth0 symfony From 5.0.0 (inc) to 5.6.0 (exc)
auth0 wp-auth0 From 5.0.0 (inc) to 5.5.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability exists in the Auth0-PHP SDK where the audience validation in access tokens is performed improperly. Because of this improper validation, affected applications may mistakenly accept ID tokens as Access tokens, which can lead to security issues. The problem affects Auth0-PHP SDK versions between v8.0.0 and v8.17.0 and other SDKs relying on these versions. The issue is fixed in version 8.18.0.

Impact Analysis

The vulnerability can impact you by allowing applications to accept ID tokens as Access tokens due to improper audience validation. This can lead to unauthorized access or privilege escalation because ID tokens are not meant to be used as Access tokens, potentially compromising the security of your application.

Mitigation Strategies

To mitigate this vulnerability, immediately upgrade the Auth0-PHP SDK to version 8.18.0 or later, which contains the patch for the issue. Also, update any dependent SDKs such as Auth0/symfony, Auth0/laravel-auth0, and Auth0/wordpress plugin to versions that rely on Auth0-PHP 8.18.0 or later.

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