cve/2021/CVE-2021-3874.md

### [CVE-2021-3874](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3874)
![](https://img.shields.io/static/v1?label=Product&message=bookstackapp%2Fbookstack&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2021.08.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-22%20Improper%20Limitation%20of%20a%20Pathname%20to%20a%20Restricted%20Directory%20('Path%20Traversal')&color=brighgreen)

### Description

bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

### POC

#### Reference
- https://huntr.dev/bounties/ac268a17-72b5-446f-a09a-9945ef58607a

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Haxatron/Haxatron