CVE-2019-5440: Revive-Adserver Revive Adserver

High severity, CVSS 8.1. EPSS: 1.6% chance of exploitation in the next 30 days.

Use of cryptographically weak PRNG in the password recovery token generation of Revive Adserver < v4.2.1 causes a potential authentication bypass attack if an attacker exploits the password recovery functionality. In lib/OA/Dal/PasswordRecovery.php, the function generateRecoveryId() generates a password reset token that relies on the PHP uniqid function and consequently depends only on the current server time, which is often visible in an HTTP Date header.

Affected products

• Revive-Adserver Revive Adserver: before 4.2.1 (fixed in 4.2.1)

Published 2019-05-28. Last modified 2026-06-17.