Convert the image to black and white (binary) to clarify the characters. Noise Removal: Filter out single-pixel "salt and pepper" noise.
The root cause of the vulnerability is . The server delegates the trust to the client browser. The server should generate a CAPTCHA, store the answer in a server-side session, validate the user input against that session, and then return the flag. By allowing the client to decide if the CAPTCHA is correct, the server gives away the secret immediately. captcha me if you can root me
The landscape of CAPTCHAs has shifted dramatically from simple distorted text to complex behavioral analysis. Convert the image to black and white (binary)