CVE-2019-12490: Simplemachines Simple Machines Forum

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An issue was discovered in Simple Machines Forum (SMF) before 2.0.16. Reverse tabnabbing can occur because of use of _blank for external links.

Affected products

• Simplemachines Simple Machines Forum: before 2.0.16 (fixed in 2.0.16)

Published 2020-01-22. Last modified 2026-06-17.