Mattermost Mobile fails to limit the maximum number of Markdown elements in a post allowing an attacker to send a post with hundreds of emojis to a channel and freeze the mobile app of users when viewing that particular channel.

Related CVEs

CVE-2023-5522

Key Information

GHSA ID

GHSA-2w9p-mj8f-374x

Published

October 17, 2023 12:30 PM

Last Modified

April 4, 2024 8:42 AM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: August 2, 2025 6:46 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.