CVE-2018-18531
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductKaptcha
PublishedOct 19, 2018
First seenOct 19, 2018
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kaptcha_project kaptcha | 2.3.2 | — |
| com.github.penggle:kaptchaMaven | v ≤ 2.3.2 | — |
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