A stored cross-site scripting (XSS) vulnerability in Simple Machines Forum v2.1.6 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Forum Name parameter.
https://wiki.simplemachines.org/smf/Installing
https://github.com/mbiesiad/vulnerability-research/tree/main/CVE-2025-67163
https://github.com/SimpleMachines/SMF/security/advisories/GHSA-p2xm-x9fp-5r7x
https://github.com/SimpleMachines/SMF/blob/release-3.0/Themes/default/Stats.template.php#L26