CVE-2025-64641

mediumpriority · track · 16OT risk · elevatedEPSS 0.002 · 7 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (7th) EPSS

CVSS 4.1 · 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 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts

cvss

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

4.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.8–4.1

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 1.4

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · ENISA EU

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · responsibledisclosure@mattermost.comexploitability 2.3 · impact 1.4

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:Nsecondary · OSV

v3.13.8lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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 (30)

Products and version ranges known to be affected.

Mattermost Mattermost Server <10.11.8all versionscert_bundDE
Mattermost Mattermost Server <10.12.4all versionscert_bundDE
Mattermost Mattermost Server <11.0.6all versionscert_bundDE
Mattermost Mattermost Server <11.1.1all versionscert_bundDE
Mattermost Mattermost Server <11.2.0all versionscert_bundDE
Mattermost Mattermost≤ Server <11.0.6cert_bundDE
Mattermost Mattermost≤ Server <10.11.8cert_bundDE
Mattermost Mattermost≤ Server <10.12.4cert_bundDE
Mattermost Mattermost≤ Server <11.1.1cert_bundDE
Mattermost Mattermost≤ Server <11.2.0cert_bundDE
Mattermost Mattermost≤ 11.0.0 ≤11.0.5enisa_euvdEU
Mattermost Mattermost≤ 11.1.0 ≤11.1.0enisa_euvdEU
Mattermost Mattermost≤ 10.12.0 ≤10.12.3enisa_euvdEU
Mattermost Mattermost≤ 10.11.0 ≤10.11.7enisa_euvdEU
mattermost mattermost server10.11.0 → 10.11.8nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server10.12.0 → 10.12.4nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server11.0.0 → 11.0.6nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
mattermost mattermost server11.1.0 → 11.1.1nvdUScpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Go github.com/mattermost/mattermost-server10.11.0 → 10.11.8osvUSpkg:golang/github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server10.11.0+incompatible → 10.11.8+incompatibleosvUSpkg:golang/github.com/mattermost/mattermost-server

showing 20 of 30

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2685Mattermost: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2025-11-26csaf · cert_bundDE
Ein Angreifer kann eine Schwachstelle in Mattermost ausnutzen, um Informationen offenzulegen.
GHSA-vww6-79rv-3j4xMattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin2025-12-24ghsa · osvUS
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
GO-2025-4260Mattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin in github.com/mattermost/mattermost-server2026-02-26vendor · osvUS
Mattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin 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 v8.0.0-20251121122154-b57c297c6d7.

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 2025-12-24modified 2026-10-19

references (5)

External citations — patches, advisories, analysis.

scry

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