CVE-2025-2527

mediumpriority · track · 0OT risk · elevatedEPSS 0.003 · 23 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.31% (23rd) EPSS

CVSS 4.3 · medium

Is it mine?

22 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-24

Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.

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:L/I:N/A:Nsecondary · ENISA EU

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

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 (22)

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 <9.11.12cert_bundDE
Mattermost Mattermost≤ Server <10.4.5cert_bundDE
Mattermost Mattermost≤ Server <10.5.3cert_bundDE
Mattermost Mattermost≤ Server <10.6.2cert_bundDE
Mattermost Mattermost≤ Server <10.7.0cert_bundDE
Mattermost Mattermost≤ 10.5.0 ≤10.5.2enisa_euvdEU
Mattermost Mattermost≤ 9.11.0 ≤9.11.11enisa_euvdEU
Mattermost Mattermostall versionsenisa_euvdEU
mattermost mattermost server10.5.0 → 10.5.3nvdUScpe: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-server10.5.0+incompatible → 10.5.3+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server9.11.0+incompatible → 9.11.12+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< 8.0.0-20250411064244-844447fbd57cosvUSpkg:golang/github.com/mattermost/mattermost/server/v8

showing 20 of 22

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-h356-3mfw-x368Mattermost Fails to Verify User's Permissions When Accessing Groups2025-05-15ghsa · osvUS
Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
GO-2025-3691Mattermost Fails to Verify User's Permissions When Accessing Groups in github.com/mattermost/mattermost-server2025-05-23vendor · osvUS
Mattermost Fails to Verify User's Permissions When Accessing Groups 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 (5)

External citations — patches, advisories, analysis.

scry

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