CVE-2025-55074

lowpriority · track · 14OT risk · elevatedEPSS 0.002 · 7 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (7th) EPSS

CVSS 3.5 · low

Is it mine?

25 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-22

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

cvss

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

3.5

010

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

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.1 · impact 1.4

v3.13lowAV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.13lowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · ENISA EU

v3.13lowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 1.3 · impact 1.4

v3.13lowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · OSV

v3.13.2lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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-200USCWE-276US

affected products (25)

Products and version ranges known to be affected.

Mattermost Mattermost Mobile <2.33.0all versionscert_bundDE
Mattermost Mattermost Server <10.11.4all versionscert_bundDE
Mattermost Mattermost Server <10.12.1all versionscert_bundDE
Mattermost Mattermost Server <10.5.12all versionscert_bundDE
Mattermost Mattermost Server <11.0.0all versionscert_bundDE
Mattermost Mattermost≤ Server <10.11.4cert_bundDE
Mattermost Mattermost≤ Mobile <2.33.0cert_bundDE
Mattermost Mattermost≤ Server <10.12.1cert_bundDE
Mattermost Mattermost≤ Server <10.5.12cert_bundDE
Mattermost Mattermost≤ Server <11.0.0cert_bundDE
Mattermost Mattermost≤ 10.11.0 ≤10.11.3enisa_euvdEU
Mattermost Mattermost≤ 10.5.0 ≤10.5.11enisa_euvdEU
Mattermost Inc Mattermost≤ 8.0.0-20250905150616-ba86dfc5876b6fstec_bduRU
Mattermost Inc Mattermost≤ 10.5.12fstec_bduRU
Mattermost Inc Mattermost≤ 10.11.4fstec_bduRU
mattermost mattermost server10.11.0 → 10.11.4nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server10.5.0 → 10.5.12nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost-server10.11.0 → 10.11.4osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server10.11.0+incompatible → 10.11.4+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server10.5.0 → 10.5.12osvUSpkg:golang/github.com/mattermost/mattermost-server

showing 20 of 25

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2315Mattermost Server und Mobile: Mehrere SchwachstellenDeutsch2025-10-15csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mattermost Server und Mobile ausnutzen, um Informationen offenzulegen oder einen Denial of Service zu verursachen.
GHSA-9hh7-6558-qfp2Mattermost allows other users to determine when users had read channels via channel member objects2025-11-18ghsa · osvUS
Mattermost versions 10.11.x <= 10.11.3, and 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects.
GO-2025-4133Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server2025-11-25vendor · osvUS
Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 before v8.0.0-20250905150616-ba86dfc5876b6.

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 nvd NVD CVE.org MITRE

published 2025-11-18modified 2026-10-19

references (5)

External citations — patches, advisories, analysis.

scry

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