SCaptcha

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Topics: SCaptcha 2.4.0

SCaptcha 2.4.0

This update fixes several security issues and improves the reliability of form verification. We recommend updating all SCaptcha 2 installations.

SCaptcha 2.4.0

Released 6 November 2026

Security and form verification

  • Sentinel remains active when a previously solved CAPTCHA is hidden after a form validation error. Changed email addresses are checked when the form is submitted again. Completed CAPTCHA verification is retained for ordinary input errors.
  • Additional image and audio code challenges have been strengthened against bypass and manipulation attempts.
  • Fixed issues in Under-Attack mode and improved protection against bypass attempts.
  • Stored blocking decisions remain effective for their intended validity period.
  • Corrected the handling of expired challenges and several error conditions.
  • Added protection for form requests and the display of request data in the widget and analytics area. CSV exports have also been made safer.
  • Security tokens are removed from URLs in newly recorded log entries.
  • Updated internal libraries and components.

Existing settings are preserved during the update.