Researchers from the University of Maryland recently break the Googles reCaptcha audio challenge system using new unCaptcha2 with 91% of accuracy. UnCaptcha is one the most popular system that protects website from bots and challenge that provides I am not a robot popups to make sure the website accessing by a real human. Earlier attempt on 2017, uncaptcha bypassed the ReCaptcha system with 85% accuracy then later Google fixed and released an update. Now researchers released the code in GitHub since Recaptcha team is aware of this attack vector.”]
Source: https://gbhackers.com/uncaptcha2-bypassed-google-recaptcha/