CVE-2026-6345

MEDIUM

Prevent password disclosure and force reset during Slack import

Title source: cna
STIX 2.1

Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2026-00614
https://mattermost.com/security-updates

Scores

CVSS v3 6.5
EPSS 0.0023
EPSS Percentile 13.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-522
Status published
Products (13)
mattermost/mattermost 0 - 8.0.0-20260311102650-3057ae7e83e9Go
Mattermost/Mattermost 10.11.0 - 10.11.13
mattermost/mattermost 10.11.0 - 10.11.14Go
Mattermost/Mattermost 10.11.14
Mattermost/Mattermost 11.4.0 - 11.4.3
mattermost/mattermost 11.4.0 - 11.4.4Go
Mattermost/Mattermost 11.4.4
Mattermost/Mattermost 11.5.0 - 11.5.1
mattermost/mattermost 11.5.0 - 11.5.2Go
Mattermost/Mattermost 11.5.2
... and 3 more
Published May 18, 2026
Tracked Since May 18, 2026