cve/2021/CVE-2021-3831.md

### [CVE-2021-3831](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3831)
![](https://img.shields.io/static/v1?label=Product&message=gnuboard%2Fgnuboard5&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%205.4.20%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%20Improper%20Neutralization%20of%20Input%20During%20Web%20Page%20Generation%20('Cross-site%20Scripting')&color=brighgreen)

### Description

gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

### POC

#### Reference
- https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/OpenGitLab/Bug-Storage