cve/2018/CVE-2018-18531.md

### [CVE-2018-18531](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18531)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/PuZhiweizuishuai/community
- https://github.com/livehub-root/livehub-java