CVEs-PoC/2013/CVE-2013-4891.md

### [CVE-2013-4891](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4891)
![](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

The xss_clean function in CodeIgniter before 2.1.4 might allow remote attackers to bypass an intended protection mechanism and conduct cross-site scripting (XSS) attacks via an unclosed HTML tag.

### POC

#### Reference
- https://github.com/bcit-ci/CodeIgniter/issues/4020
- https://nealpoole.com/blog/2013/07/codeigniter-21-xss-clean-filter-bypass/

#### Github
- https://github.com/ibnoe/PHP-CodeIgniter-Version-Scanner