CVE-2025-3446

mediumpriority · track · 0OT risk · elevatedEPSS 0.003 · 17 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 4.3 · medium

Is it mine?

30 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USCWE-863US

affected products (30)

Products and version ranges known to be affected.

Mattermost Mattermost Server <10.4.5all versionscert_bundDE
Mattermost Mattermost Server <10.5.3all versionscert_bundDE
Mattermost Mattermost Server <10.6.2all versionscert_bundDE
Mattermost Mattermost Server <10.7.0all versionscert_bundDE
Mattermost Mattermost Server <9.11.12all versionscert_bundDE
Mattermost Mattermost≤ Server <10.6.2cert_bundDE
Mattermost Mattermost≤ Server <10.4.5cert_bundDE
Mattermost Mattermost≤ Server <10.5.3cert_bundDE
Mattermost Mattermost≤ Server <10.7.0cert_bundDE
Mattermost Mattermost≤ Server <9.11.12cert_bundDE
Mattermost Mattermostall versionsenisa_euvdEU
Mattermost Mattermost≤ 10.5.0 ≤10.5.2enisa_euvdEU
Mattermost Mattermost≤ 10.6.0 ≤10.6.1enisa_euvdEU
Mattermost Mattermost≤ 9.11.0 ≤9.11.11enisa_euvdEU
Mattermost Mattermost≤ 10.4.0 ≤10.4.4enisa_euvdEU
mattermost mattermost server10.4.0 → 10.4.5nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server10.5.0 → 10.5.3nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server10.6.0 → 10.6.2nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server9.11.0 → 9.11.12nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost-server10.4.0+incompatible → 10.4.5+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server

showing 20 of 30

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0830Mattermost: Mehrere SchwachstellenDeutsch2025-04-15csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder einen Denial of Service zu verursachen.
GHSA-r7r2-m3vr-c8qcMattermost Fails to Validate Team Invite Permissions2025-05-15ghsa · osvUS
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
GO-2025-3693Mattermost Fails to Validate Team Invite Permissions in github.com/mattermost/mattermost-server2025-05-23vendor · osvUS
Mattermost Fails to Validate Team Invite Permissions in github.com/mattermost/mattermost-server

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2025-05-15modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan