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How the CVE Works
The vulnerability (CVE-2025-XXXXX) in Auth0-PHP SDK (versions 8.0.0-BETA1 to 8.13.0) allows attackers to brute-force authentication tags in encrypted session cookies when using CookieStore. Due to weak cryptographic validation, an attacker can forge session cookies, bypass authentication, and hijack user sessions. This affects applications relying on Auth0-PHP SDK for session management in Symfony, Laravel, and WordPress.
DailyCVE Form
Platform: Auth0-PHP SDK
Version: 8.0.0-BETA1 – 8.13.0
Vulnerability: Session Forgery
Severity: Critical
Date: May 16, 2025
What Undercode Say:
Exploitation Analysis
1. Cookie Extraction: Attackers intercept encrypted session cookies.
- Brute-Force Attack: Weak auth-tag validation allows offline brute-forcing.
3. Session Hijacking: Forged cookies grant unauthorized access.
Exploit Command (PoC)
python3 brute_auth0_cookie.py -c <stolen_cookie> -w <wordlist>
Protection Measures
1. Immediate Upgrade:
composer require auth0/auth0-php:8.14.0
2. Key Rotation:
// config.php $store = new CookieStore(['secret' => bin2hex(random_bytes(32))]);
3. HTTP-Only & Secure Flags:
ini_set('session.cookie_httponly', '1');
ini_set('session.cookie_secure', '1');
Detection Script
if (version_compare(\Auth0\SDK\Auth0::VERSION, '8.14.0', '<')) {
die("VULNERABLE: Upgrade Auth0-PHP SDK!");
}
Log Analysis
Check for unusual session activity:
grep "Invalid session token" /var/log/auth0.log
Mitigation Steps
1. Web Server Config:
add_header Set-Cookie "Secure; HttpOnly; SameSite=Strict";
2. Rate Limiting:
// Laravel Middleware
RateLimiter::for('login', function (Request $request) {
return Limit::perMinute(10);
});
References
– Auth0 Advisory
– CVE-2025-XXXXX
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
