CVE-2023-5522

MEDIUM

Mattermost Mobile < 2.8.0 - Denial of Service via Excessive Markdown Elements

Title source: llm

Description

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.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0008

EPSS Percentile 24.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (1)

mattermost/mattermost < 2.8.0 (2 CPE variants)

Published Oct 17, 2023

Tracked Since Feb 18, 2026