CVEs-PoC/2021/CVE-2021-23382.md

### [CVE-2021-23382](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23382)
![](https://img.shields.io/static/v1?label=Product&message=postcss&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%208.2.13%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Regular%20Expression%20Denial%20of%20Service%20(ReDoS)&color=brighgreen)

### Description

The package postcss before 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and loadAnnotation() in lib/previous-map.js. The vulnerable regexes are caused mainly by the sub-pattern \/\*\s* sourceMappingURL=(.*).

### POC

#### Reference
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640

#### Github
- https://github.com/engn33r/awesome-redos-security