---
title: "GHSA-c42h-56wx-h85q: laravel-auth0 SDK Deserialization of Untrusted Data vulnerability"
url: https://erroneo.us/security/ghsa/GHSA-c42h-56wx-h85q/
description: "GHSA-c42h-56wx-h85q (critical, Composer (PHP)): laravel-auth0 SDK Deserialization of Untrusted Data vulnerability. Overview The laravel-auth0 SDK contains a…"
type: advisory
section: "Security Digest"
date_published: 2025-06-06
date_modified: 2025-06-06
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-c42h-56wx-h85q"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-c42h-56wx-h85q: laravel-auth0 SDK Deserialization of Untrusted Data vulnerability

## Affected packages

- Composer (PHP) `auth0/login` >= 7.0.0-BETA1, <= 7.2.1 → fixed: 7.2.2

## Details

Overview The laravel-auth0 SDK contains a critical 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 laravel-auth0 SDK, versions between 7.0.0-BETA1 to 7.2.1. 2. Laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. Fix Upgrade Auth0/laravel-auth0 to the latest version (v7.17.0). Acknowledgement Okta would like to thank Andreas Forsblom for discovering this vulnerability.

## Sources

- [GitHub Advisory GHSA-c42h-56wx-h85q](https://github.com/advisories/GHSA-c42h-56wx-h85q)
- [github.com](https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492)
- [github.com](https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q)
- [github.com](https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34)
- [github.com](https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r)
- [nvd.nist.gov](https://nvd.nist.gov/vuln/detail/CVE-2025-48951)

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Source page: https://erroneo.us/security/ghsa/GHSA-c42h-56wx-h85q/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt