CVE-2025-41410 — Missing Authorization in Mattermost Mattermost-server

CWE-862 — Missing Authorization5 documents4 sources
Severity
5.4MEDIUMNVD
EPSS
0.0%
top 98.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedOct 16
Latest updateOct 30

Description

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.5

Affected Packages4 packages

▶NVDmattermost/mattermost_server10.5.0 — 10.5.11+2
▶Gogithub.com/mattermost_mattermost-server10.5.0+incompatible — 10.5.11+incompatible+5
▶Gogithub.com/mattermost_mattermost_server_v8< 8.0.0-20250822083415-01b95392a450
▶CVEListV5mattermost/mattermost10.10.0 — 10.10.2+2

🔴Vulnerability Details

4
OSV
Mattermost has a Missing Authorization vulnerability in github.com/mattermost/mattermost-server↗2025-10-30
▶
OSV
Mattermost has a Missing Authorization vulnerability↗2025-10-16
▶
CVEList
Slack import bypasses email verification for team access controls↗2025-10-16
▶
GHSA
Mattermost has a Missing Authorization vulnerability↗2025-10-16
▶
CVE-2025-41410 — Missing Authorization | cvebase