Description
Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Mattermost via replayed webhook requests. Mattermost Advisory ID: MMSA-2026-00584
References (1)
Scores
CVSS v3
2.2
EPSS
0.0005
EPSS Percentile
15.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-754
Status
published
Products (3)
Mattermost/Mattermost
< 10.11.11
Mattermost/Mattermost
10.11.12
Mattermost/Mattermost
11.5.0
Published
Mar 26, 2026
Tracked Since
Mar 26, 2026