Multiple cross-site scripting (XSS) vulnerabilities pm_popup.php in MKPortal 1.1 Rc1 and earlier, as used with vBulletin 3.5.4 and earlier, allow remote attackers to inject arbitrary web script or HTML via the (1) u1, (2) m1, (3) m2, (4) m3, (5) m4 parameters.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.097
EPSS Ranking 92.6%