CVE-2026-6062

MEDIUM

Mattermost - IDOR in Jira Plugin Subscription Edit Endpoint

Title source: rule
STIX 2.1

Description

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 Fail to validate channel ownership of an existing subscription before applying edits which allows an authenticated attacker to hijack subscriptions from channels they have no access to via a crafted PUT request to the subscription edit endpoint.. Mattermost Advisory ID: MMSA-2026-00650

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2026-00650
https://mattermost.com/security-updates

Scores

CVSS v3 6.4
EPSS 0.0015
EPSS Percentile 4.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-639
Status published
Products (10)
Mattermost/Mattermost 10.11.0 - 10.11.17
Mattermost/Mattermost 10.11.18
Mattermost/Mattermost 11.5.0 - 11.5.5
Mattermost/Mattermost 11.5.6
Mattermost/Mattermost 11.6.0 - 11.6.2
Mattermost/Mattermost 11.6.3
Mattermost/Mattermost 11.7.0
Mattermost/Mattermost 11.7.1
Mattermost/Mattermost 11.8.0
mattermost/mattermost_server 10.11.0 - 10.11.18
Published Jun 22, 2026
Tracked Since Jun 22, 2026