Excessive resource consumption when sending long emoji names in user custom status
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.7%
exploitation probability
0.7%top 49% of all CVEs
observed exploitation
nono source reports it
Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products
Mattermost · MattermostReferences
https://mattermost.com/security-updates