CVE-2004-0259: Joe Lumbroso Acks Formmail.php

High severity, CVSS 9.3. EPSS: 2.1% chance of exploitation in the next 30 days.

The check_referer() function in Formmail.php 5.0 and earlier allows remote attackers to bypass access restrictions via an empty or spoofed HTTP Referer, as demonstrated using an application on the same web server that contains a cross-site scripting (XSS) issue.

Affected products

• Joe Lumbroso Acks Formmail.php: version 2.0 only; version 5.0 only

Published 2004-11-23. Last modified 2026-06-16.