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: auth0-php; auth0: laravel-auth0; auth0: symfony; auth0: wp-auth0
References10
- github.com/auth0/auth0-PHP/security/advisories/GHSA-j2vm-wrq3-f… Vendor Advisory
- github.com/auth0/laravel-auth0/security/advisories/GHSA-7hh9-gp… Vendor Advisory
- github.com/auth0/symfony/security/advisories/GHSA-f3r2-88mq-9v4g Vendor Advisory
- github.com/auth0/wordpress/security/advisories/GHSA-vvg7-8rmq-9… Vendor Advisory
- github.com/auth0/auth0-PHP/commit/7fe700053aee609718460c123f00f… Patch
- github.com/auth0/laravel-auth0/commit/a1c3344dc0e5a36e8f56c8cfc… Patch
- github.com/auth0/symfony/commit/0103d6f8dcef6996653fad1f823d1c1… Patch
- github.com/auth0/wordpress/commit/b207c6f7fd06507b90c4e6bcc18a8… Patch
- github.com/auth0/auth0-PHP/releases/tag/8.18.0 ProductRelease Notes
- github.com/auth0/laravel-auth0/releases/tag/7.20.0 ProductRelease Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 37 · as of 11 November 2026
- CWE
- CWE-863
Could this be exploited in your environment?
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