In the last couple of weeks (April 22, 2011) I have noticed a lot of comment form spamming on my Drupal websites that use the Captcha module, is there a patch available to block automated submissions that use this module?
Details - The title is always the same: "Interesting information about activation"
The body of the comment is always the same: "I think this board is the proper place to ask you about the activation proccess. My link is not working properly, do you know why it is happening?"
The link included, always follows the same format: [your domain]/?#### (13 hex digits + one number, 27 characters total)
This is a wide spread attack ... Google for "Interesting information about activation" to find 28,000+ Drupal sites that have fallen prey to this.
Has any one else encountered this? I have my suspicions that this may be a core issue rather than Captcha issue - I'll continue my research.
My site: Captcha-6.x-2.4; Drupal core: 6.20