CVE-2025-20051

mediumpriority · track · 26EPSS 0.006 · 49 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.61% (49th) EPSS

CVSS 6.5 · medium

Is it mine?

34 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.

cvss

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

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6–9.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.19.9criticalAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · responsibledisclosure@mattermost.comexploitability 3.1 · impact 6

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22USCWE-22USCWE-22US

affected products (34)

Products and version ranges known to be affected.

Mattermost Mattermost <10.2.3all versionscert_bundDE
Mattermost Mattermost <10.3.3all versionscert_bundDE
Mattermost Mattermost <10.4.2all versionscert_bundDE
Mattermost Mattermost <10.5.0all versionscert_bundDE
Mattermost Mattermost <9.11.8all versionscert_bundDE
Mattermost Mattermost< 10.2.3cert_bundDE
Mattermost Mattermost< 10.3.3cert_bundDE
Mattermost Mattermost< 10.4.2cert_bundDE
Mattermost Mattermost< 10.5.0cert_bundDE
Mattermost Mattermost< 9.11.8cert_bundDE
Mattermost Mattermost≤ 10.3.0 ≤10.3.2enisa_euvdEU
Mattermost Mattermost≤ 9.11.0 ≤9.11.7enisa_euvdEU
Mattermost Mattermost≤ 10.2.0 ≤10.2.2enisa_euvdEU
Mattermost Mattermost≤ 10.4.0 ≤10.4.1enisa_euvdEU
Mattermost Inc Mattermost10.2 → 10.2.2fstec_bduRU
Mattermost Inc Mattermost10.3 → 10.3.2fstec_bduRU
Mattermost Inc Mattermost10.4 → 10.4.1fstec_bduRU
Mattermost Inc Mattermost9.11 → 9.11.7fstec_bduRU
mattermost mattermostall versionsncsc_nlNLcpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
mattermost mattermost server10.2.0 → 10.2.3nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

showing 20 of 34

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2025-0068Kwetsbaarheden verholpen in MattermostNL2025-02-24csaf · ncsc_nlNL
Mattermost heeft kwetsbaarheden verholpen in versies 10.4.x, 9.11.x, 10.3.x, 10.2.x en 10.1.x.
WID-SEC-W-2025-0187Mattermost: Mehrere SchwachstellenDeutsch2025-01-23csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um einen SQL Angriff durchzuführen oder Informationen offenzulegen.
GHSA-v469-7wp6-7cvpMattermost allows reading arbitrary files2025-02-24ghsa · osvUS
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.
GO-2025-3483Mattermost allows reading arbitrary files in github.com/mattermost/mattermost-server2025-03-03vendor · osvUS
Mattermost allows reading arbitrary files in github.com/mattermost/mattermost-server

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2025-02-24modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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