cve/2021/CVE-2021-28965.md

### [CVE-2021-28965](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28965)
![](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 REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/Tabll/gemnasium-db
- https://github.com/sonatype-nexus-community/chelsea