CVE-2006-7013: Simple Machines Forum

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

QueryString.php in Simple Machines Forum (SMF) 1.0.7 and earlier, and 1.1rc2 and earlier, allows remote attackers to more easily spoof the IP address and evade banning via a modified X-Forwarded-For HTTP header, which is preferred instead of other more reliable sources for the IP address. NOTE: the original researcher claims that the vendor has disputed this issue

Affected products

• Simple Machines Simple Machines Forum: up to and including 1.0.7; up to and including 1.1_rc2

Published 2007-02-15. Last modified 2026-06-16.