CVE-2018-18531

CriticalCVSS 9.8/10Last 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.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-330

Affected software

No affected versions have been published.

Timeline

Published: Oct 19, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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