CVE-2018-18531

—

CVSS 3.0

9.8 critical

EPSS

1%p72

Published

Oct 19, 2018 (Oct 19, 2018)

Modified

Jun 17, 2026

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.

Vendors: kaptcha project
Products: kaptcha
Weakness: CWE-330
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.5%)

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