6.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-68129

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

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.

(GitHub Advisory)

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CVE-2025-68129

CVE-2025-68129:

6.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
auth0/auth0-php	composer	>= 8.0.0, < 8.18.0	8.18.0

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The analysis of the provided security advisory and the associated commit 7fe700053aee609718460c123f00f53c511f0f7f points to a specific flaw in the token validation logic of the Auth0-PHP SDK. The vulnerability, described as 'Improper Audience Validation', allowed ID tokens to be used as access tokens. The patch modifies the validate() method within src/Token.php. Specifically, the change ensures that the application's clientId is only added to the list of expected audiences ($tokenAudience) if the token being validated is not an access token. Previously, the clientId was always added, causing the validation to incorrectly pass for ID tokens when an access token was expected. Therefore, the Auth0\SDK\Token::validate function is the direct location of the vulnerability, as it was responsible for the flawed audience validation logic.

Vulnerable functions

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WAF Rule

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Reasoning

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