CVEs-PoC/2021/CVE-2021-21269.md

### [CVE-2021-21269](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21269)
![](https://img.shields.io/static/v1?label=Product&message=keymaker&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-22%3A%20Improper%20Limitation%20of%20a%20Pathname%20to%20a%20Restricted%20Directory%20('Path%20Traversal')&color=brighgreen)

### Description

Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server. In Keymaker before version 0.2.0, the assets endpoint did not check for the extension. The rust `join` method without checking user input might have made it abe to do a Path Traversal attack causing to read more files than allowed. This is fixed in version 0.2.0.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/Artisan-Lab/Rust-memory-safety-bugs