CVEs-PoC/2021/CVE-2021-27736.md

### [CVE-2021-27736](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27736)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/CompassSecurity/SAMLRaider
- https://github.com/FusionAuth/fusionauth-samlv2