The Hotblocks module 6.x-1.x before 6.x-1.8 for Drupal allows remote authenticated users with the "administer hotblocks" permission to cause a denial of service (infinite loop and time out) via a block that references itself.

Cross-site scripting (XSS) vulnerability in the settings page (admin/settings/hotblocks) in the Hotblocks module 6.x-1.x before 6.x-1.8 for Drupal allows remote authenticated users with the "administer hotblocks" permission to inject arbitrary web script or HTML via the "block names."