### [CVE-2021-34435](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34435)
![](https://img.shields.io/static/v1?label=Product&message=Eclipse%20Theia&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=0.3.9%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=unspecified%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-942&color=brightgreen)

### Description

In Eclipse Theia 0.3.9 to 1.8.1, the "mini-browser" extension allows a user to preview HTML files in an iframe inside the IDE. But with the way it is made it is possible for a previewed HTML file to trigger an RCE. This exploit only happens if a user previews a malicious file..

### POC

#### Reference
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=568018

#### Github
No PoCs found on GitHub currently.