GHSA-v9m8-9xxp-q492
Auth0-PHP SDK Deserialization of Untrusted Data vulnerability
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | auth0/auth0-php | >= 8.0.0-BETA3, < 8.3.1 | 8.3.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
**Overview**
The Auth0 PHP SDK contains a vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data.
**Am I Affected?**
You are affected by this vulnerability if you meet the following preconditions:
1. Applications using the Auth0-PHP SDK, versions between 8.0.0-BETA3 to 8.3.0.
2. Applications using the following SDKs that rely on the Auth0-PHP SDK versions between 8.0.0-BETA3 to 8.3.0:
a. Auth0/symfony,
b. Auth0/laravel-auth0,
c. Auth0/wordpress.
**Fix**
Upgrade Auth0/Auth0-PHP to 8.3.1.
**Acknowledgement**
Okta would like to thank Andreas Forsblom for discovering this vulnerability.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492
- https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q
- https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34
- https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r
- https://nvd.nist.gov/vuln/detail/CVE-2025-48951
- https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715
- https://github.com/auth0/auth0-PHP