Cross-site scripting (XSS) vulnerability in the Block Class module 7.x-2.x before 7.x-2.2 for Drupal allows remote authenticated users with the "Administer block classes" permission to inject arbitrary web script or HTML via a class name.
Cross-site scripting (XSS) vulnerability in block_class.module in the Block Class module before 7.x-1.1 for Drupal allows remote authenticated users with certain permissions to inject arbitrary web script or HTML via the class name.