### [CVE-2024-1402](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-1402)
![](https://img.shields.io/static/v1?label=Product&message=Mattermost&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-400%3A%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post. 

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/c0rydoras/cves
- https://github.com/fkie-cad/nvd-json-data-feeds