Drupal Core 4.5.x Mail Header Injection (4.5.0 - 4.5.7)
Description
Drupal Core is prone to a mail header injection vulnerability. Exploiting this issue could allow an attacker to use a vulnerable Drupal site to send unwanted emails. Drupal Core versions 4.5.x ranging from 4.5.0 and up to and including 4.5.7 are vulnerable.
Remediation
Update to Drupal Core version 4.5.8 or latest