Yesterday we released a new version of Textimage and Captcha modules, those release fix some security bypass, everyone use any version of those module MUST upgrade.

If you have doubts about how to proceed, contact me and I help you. ;)

Thanks Heine Deelstra and the folks from Drupal Security team for the great work.

Below the security releases:

Textimage - response validation bypass
Captcha - response validation bypass