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Automatically fill in verification code in course selection system login page

Verification code is broadly used in different websites to ensure the contents are only accessible by humans instead of bots. The course selection system in my college has also been added a verification code field in the login page to reduce momentary load of its server. (by slowing down everyone’s time to fill in the code and hit log in)

Besides that, the system was kindly designed a “Play Audio” button as well for visually impaired people to “hear” the verification code. However, there is a defect that we can take advantage of the “Play Audio” button function to fill in the verification code programmatically for us.

Since I have done my last course selection in my college life, I will demonstrate how to fill in the verification code by exploiting the “Play Audio” button function in below.


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