CVE-2007-0399: Simple Machines Forum

Medium severity, CVSS 6.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in index.php in Simple Machines Forum (SMF) 1.1 RC3 allow remote authenticated users to inject arbitrary web script or HTML via the (1) recipient or (2) BCC field when selecting send in a pm action.

Affected products

• Simple Machines Simple Machines Forum: version 1.1_rc3 only

Published 2007-01-22. Last modified 2026-06-16.