CVE-2025-13324

lowpriority · track · 0OT risk · elevatedEPSS 0.002 · 10 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (10th) EPSS

CVSS 3.7 · low

Is it mine?

17 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-28

Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.

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⚠ sources disagree · low–medium · 3.4–4.3

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.2 · 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

v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/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 (17)

Products and version ranges known to be affected.

Mattermost Mattermost≤ 10.12.0 ≤10.12.2enisa_euvdEU
Mattermost Mattermost≤ 11.0.0 ≤11.0.4enisa_euvdEU
Mattermost Mattermost≤ 10.11.0 ≤10.11.5enisa_euvdEU
mattermost mattermost server10.11.0 → 10.11.6nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server10.12.0 → 10.12.3nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server11.0.0 → 11.0.5nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost10.11.0-rc1 → 10.11.5osvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost10.11.0-rc1+incompatible → 10.11.5+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost10.12.0 → 10.12.2osvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost10.12.0+incompatible → 10.12.2+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost11.0.0-alpha.1 → 11.0.4osvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost11.0.0-alpha.1+incompatible → 11.0.4+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost
Go github.com/mattermost/mattermost-server< 11.0.4osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server< 11.0.4+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server/v5all versionsosvUSpkg:golang/github.com/mattermost/mattermost-server/v5
Go github.com/mattermost/mattermost-server/v6all versionsosvUSpkg:golang/github.com/mattermost/mattermost-server/v6
Go github.com/mattermost/mattermost/server/v8< 8.0.0-20251031095924-e7e23b94e006osvUSpkg:golang/github.com/mattermost/mattermost/server/v8

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-x3r8-2hmh-89f5Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation2025-12-17ghsa · osvUS
Mattermost versions 10.11.x < 10.11.5, 11.0.x < 11.0.4, 10.12.x < 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.
GO-2025-4256Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation in github.com/mattermost/mattermost2025-12-30vendor · osvUS
Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation in github.com/mattermost/mattermost

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2025-12-17modified 2026-10-13

references (5)

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