GHSA-f3r2-88mq-9v4g: Auth0 Symfony SDK has Improper Audience Validation via Auth0-PHP SDK

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2. GitHub Reviewed
3. GHSA-f3r2-88mq-9v4g

Auth0 Symfony SDK has Improper Audience Validation via Auth0-PHP SDK

Moderate severity GitHub Reviewed Published Dec 17, 2025 in auth0/symfony • Updated Dec 17, 2025

Package

composer auth0/symfony (Composer)

Affected versions

>= 5.0.0, <= 5.5.0

Description

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.

Affected product and versions

Projects are affected if they meet the following preconditions:

• Applications using the Auth0 Symfony SDK with versions between 5.0.0 and 5.5.0
• Auth0 Symfony SDK uses the Auth0-PHP SDK with versions between 8.0.0 and 8.17.0.

Resolution

Upgrade Auth0/symfony to version 5.6.0 or greater.

Acknowledgement

Okta would like to thank Jafar Sadiq (iaf4r) for their discovery and responsible disclosure.

References

• GHSA-f3r2-88mq-9v4g
• auth0/symfony@0103d6f
• https://github.com/auth0/symfony/releases/tag/5.6.0

Published to the GitHub Advisory Database

Dec 17, 2025

Last updated

Dec 17, 2025