Description
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. An attacker could create fictive system-message posts via webhooks and slash commands, in the v3 or v4 REST API.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://mattermost.com/security-updates/
Scores
CVSS v3
4.3
EPSS
0.0023
EPSS Percentile
45.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-20
Status
published
Products (3)
mattermost/mattermost-server
0 - 4.1.2Go
mattermost/mattermost_server
4.3.0 rc1 (4 CPE variants)
mattermost/mattermost_server
< 4.1.2
Published
Jun 19, 2020
Tracked Since
Feb 18, 2026