A Stored XSS vulnerability in forum reward comments in GazellePW (GazellePosterWall) commit 86c4bedf727691b5a97af42a4864869d18446449 allows remote attackers to inject arbitrary JavaScript via the c parameter in /forums.php?action=ajax_get_jf which is later rendered in the data-tooltip attribute in /forums.php?action=viewthread and interpreted as HTML by the Tooltipster configuration.