### [CVE-2021-3906](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3906)
![](https://img.shields.io/static/v1?label=Product&message=bookstackapp%2Fbookstack&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2021.10.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-434%20Unrestricted%20Upload%20of%20File%20with%20Dangerous%20Type&color=brighgreen)

### Description

bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type

### POC

#### Reference
No PoCs from references.

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