| Package | Affected versions | Patched versions |
|---|---|---|
| com.github.penggle:kaptcha | ≤ 2.3.2 | |
| kaptcha | = 2.3.2 |
text/impl/DefaultTextCreator.java, text/impl/ChineseTextProducer.java, and text/impl/FiveLetterFirstNameTextCreator.java in kaptcha 2.3.2 use the Random (rather than SecureRandom) function for generating CAPTCHA values, which makes it easier for remote attackers to bypass intended access restrictions via a brute-force approach.
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