EPSS
Percentile
71.8%
z3c.form in Plone CMS 5.x through 5.0.6 and 4.x through 4.3.11 allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted GET request.
bugzilla.redhat.com/show_bug.cgi?id=1373437
plone.org/security/hotfix/20160830/non-persistent-xss-in-plone-forms