CVE-2026-3109CWE-754

Missing timestamp validation in Zoom webhook handler

Low · published March 26, 2026

CVSS v3.1
2.2
EPSS
0%
Percentile
22.3
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
2.2 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00307 · 22.3th percentile
Weakness
CWE-754 · Improper Check for Unusual or Exceptional Conditions
Published
2026-03-26T16:28Z
EPSS history
Timeline
  • 26 MAR 16:28Z
    Missing timestamp validation in Zoom webhook handler
    cvelistv5