CoreCVE
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CRITICAL

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

Published Oct 19, 2018

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

Weaknesses (1)

CWE-330

Insufficient Randomness

References (3)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 19, 2018
Updated Sep 17, 2024
Reserved Oct 19, 2018
Link CVE-2018-18531
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2018-18531
Red Hat
Severity n/a
Public date n/a
Links CVE-2018-18531
GHSA-8Q89-PWHH-7WFQ