### [CVE-2016-9461](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9461)
![](https://img.shields.io/static/v1?label=Product&message=Nextcloud%20Server%20%26%20ownCloud%20Server%20Nextcloud%20Server%20before%209.0.52%20%26%20ownCloud%20Server%20before%209.0.4&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Permission%20Issues%20(CWE-275)&color=brighgreen)

### Description

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a read-only share to put new files in there. It was not possible to modify existing files.

### POC

#### Reference
- https://hackerone.com/reports/145950
- https://hackerone.com/reports/145950

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