Cross-site scripting (XSS) vulnerability in Zope 2.8.x before 2.8.12, 2.9.x
before 2.9.12, 2.10.x before 2.10.11, 2.11.x before 2.11.6, and 2.12.x
before 2.12.3 allows remote attackers to inject arbitrary web script or
HTML via vectors related to error messages.