CVE-2025-48951

Critical

Description

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. Versions 8.0.0-BETA3 prior to 8.3.1 contain 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. Applications using the Auth0-PHP SDK are affected, as are applications using the Auth0/symfony, Auth0/laravel-auth0, or Auth0/wordpress SDKs, because those SDKsrely on the Auth0-PHP SDK versions from 8.0.0-BETA3 until 8.14.0. Version 8.3.1 contains a patch for the issue.

SeverityCritical
CVSS9.3
Exploit probability—
ProductAuth0/auth0-php
PublishedJun 3, 2025
First seenJun 3, 2025

How to fix

Update
  • auth0/auth0-php8.3.1 or later

Affected products

ProductAffected versionsFixed in
auth0/auth0-phpPackagist8.0.0-BETA3 ≤ v < 8.3.18.3.1

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