Description
Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_misc
https://mattermost.com/security-updates/
Exploit, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1620170
Scores
CVSS v3
3.1
EPSS
0.0040
EPSS Percentile
60.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/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-434
CWE-400
Status
published
Products (2)
mattermost/mattermost-server
7.1.0 - 7.2.0Go
mattermost/mattermost_server
< 7.2.0
Published
Sep 23, 2022
Tracked Since
Feb 18, 2026