CVE-2026-3109

LOW EPSS 20.7%

Published Mar 26, 20263mo ago · Modified Jun 17, 20261w ago

2.2 CVSS 3.1

Low

Published Mar 26, 2026 3mo ago

Last Modified Jun 17, 2026 1w ago

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

CVSS Details

Base Score

2.2

Exploitability

0.7

Impact

1.4

Vector string

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

Attack Vector Network

Attack Complexity High

Privileges Required High

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability Low

Threat Intelligence

EPSS Exploit Probability

20.7% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-754

Affected Products 1

Vendor	Product	Version	Range
mattermost	mattermost_server	*	≥10.11.0 – <10.11.12

References 1

mattermost.com https://mattermost.com/security-updates

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.