Description
Mattermost Desktop App versions <= 5.13.0 fail to validate URLs external to the configured Mattermost servers, allowing an attacker on a server the user has configured to crash the user's application by sending the user a malformed URL.
References (1)
Scores
CVSS v3
3.5
EPSS
0.0006
EPSS Percentile
17.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1287
Status
published
Products (1)
mattermost/mattermost_desktop
< 5.13.1.0
Published
Oct 13, 2025
Tracked Since
Feb 18, 2026