Headline

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

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:

Applications using the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1.
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).

1 day ago

ghsa

Open in Source

#vulnerability #git #wordpress #php #auth

GitHub Advisory Database
GitHub Reviewed
GHSA-862m-5253-832r

Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data

Critical severity GitHub Reviewed Published Jun 3, 2025 in auth0/wordpress • Updated Jun 5, 2025

Package

composer auth0/wordpress (Composer)

Affected versions

>= 5.0.0-BETA0, <= 5.0.1

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:

Applications using the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1.
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).

References