Dashboard / CVE-2026-18795

CVE-2026-18795

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 53/100
Published: 2026-10-16 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: Low
UI: None
S: Unchanged
C: High
I: Low
A: Low

Description

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to enforce DM/GM check on server side which allows an authenticated user to quarantine a post belonging to DM or GM via direct API call.. Mattermost Advisory ID: MMSA-2026-00756

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
mattermost mattermost_server 11.7.0 – 11.7.10
mattermost mattermost_server 11.10.0

References & Advisories (1)

Bug Bounty Relevance

53 / 100
✓ Network accessible
✓ No user interaction

CVSS Score

6.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

EPSS — Exploitation Probability

0.15%
Raw Score 0.001500
Percentile 4.2%
Date 2026-10-29

Intelligence Sources

nvd ref →

External Links