---
title: "GHSA-862m-5253-832r: Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data"
url: https://erroneo.us/security/ghsa/GHSA-862m-5253-832r/
description: "GHSA-862m-5253-832r (critical, Composer (PHP)): Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data. Overview The Auth0 Wordpress plugin…"
type: advisory
section: "Security Digest"
date_published: 2025-06-05
date_modified: 2025-06-05
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-862m-5253-832r"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-862m-5253-832r: Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data

## Affected packages

- Composer (PHP) `auth0/wordpress` >= 5.0.0-BETA0, <= 5.0.1 → fixed: 5.1.0

## Details

Overview The Auth0 Wordpress plugin 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 the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1. 2. Auth0 WordPress plugin uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. Fix Upgrade the Auth0 WordPress plugin to the latest version (v5.3.0).

## Sources

- [GitHub Advisory GHSA-862m-5253-832r](https://github.com/advisories/GHSA-862m-5253-832r)
- [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-862m-5253-832r/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt