cve/2024/CVE-2024-40643.md

### [CVE-2024-40643](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-40643)
![](https://img.shields.io/static/v1?label=Product&message=joplin&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%203.0.15%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%3A%20Improper%20Neutralization%20of%20Input%20During%20Web%20Page%20Generation%20('Cross-site%20Scripting')&color=brightgreen)

### Description

Joplin is a free, open source note taking and to-do application. Joplin fails to take into account that "<" followed by a non letter character will not be considered html. As such it is possible to do an XSS by putting an "illegal" tag within a tag.

### POC

#### Reference
- https://github.com/laurent22/joplin/security/advisories/GHSA-g796-3g6g-jmmc

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds