cve/2019/CVE-2019-12739.md

### [CVE-2019-12739](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12739)
![](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

lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).

### POC

#### Reference
- https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/
- https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/

#### Github
No PoCs found on GitHub currently.