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Web_Hacking/Captcha Bypass.md
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Update Captcha Bypass.md
2023-09-01 15:44:50 +03:30

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Captcha Bypass

  • Do not send the parameter related to the captcha
    • Change from POST to GET or other HTTP Verbs
    • Change to JSON or from JSON
  • Send the captcha parameter empty
  • Check if the value of the captcha is in the source code of the page
  • Check if the value is inside a cookie
  • Try to use an old captcha value
  • Check if you can use the same captcha value several times with the same or different sessionID
  • If the captcha consists on a mathematical operation try to automate the calculation
  • If the captcha consists of read characters from an image, check manually or with code how many images are being used and if only a few images are being used, detect them by MD5
  • Use an OCR (https://github.com/tesseract-ocr/tesseract)

Online Services to bypass captchas

Capsolver‘s automatic captcha solver offers the most affordable and quick captcha-solving solution. You may rapidly combine it with your program using its simple integration option to achieve the best results in a matter of seconds.