cve/2023/CVE-2023-6551.md

### [CVE-2023-6551](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6551)
![](https://img.shields.io/static/v1?label=Product&message=class.upload.php&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20%20Improper%20Input%20Validation&color=brighgreen)

### Description

As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. The README has been updated to include these guidelines.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds