CVEs-PoC/2021/CVE-2021-43309.md

### [CVE-2021-43309](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43309)
![](https://img.shields.io/static/v1?label=Product&message=uri-template-lite&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-1333%20Inefficient%20Regular%20Expression%20Complexity&color=brightgreen)

### Description

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the uri-template-lite npm package, when an attacker is able to supply arbitrary input to the "URI.expand" method

### POC

#### Reference
- https://research.jfrog.com/vulnerabilities/uri-template-lite-redos-xray-211351/

#### Github
- https://github.com/SSU-Shook/npm-Dataset