Vulnerability Details CVE-2018-18531
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 57.5%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 5.0
Products affected by CVE-2018-18531
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cpe:2.3:a:kaptcha_project:kaptcha:2.3.2