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.
Plone CMS versions 4.3.11 and below and versions 5.0.6 and below suffer from cross site scripting, open redirection, and path traversal vulnerabilities.