CVE-2025-55035

mediumpriority · track · 0EPSS 0.003 · 24 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.32% (24th) EPSS

CVSS 6.1 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-28

Mattermost Desktop App versions <=5.13.0 fail to manage modals in the Mattermost Desktop App that stops a user with a server that uses basic authentication from accessing their server which allows an attacker that provides a malicious server to the user to deny use of the Desktop App via having the user configure the malicious server and forcing a modal popup that cannot be closed.

cvss

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

6.1

010

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

v3.16.1mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.1mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · responsibledisclosure@mattermost.comexploitability 1.6 · impact 4

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H/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-754US

affected products (4)

Products and version ranges known to be affected.

Mattermost Mattermost Desktop <5.13.1.0all versionscert_bundDE
Mattermost Mattermost≤ Desktop <5.13.1.0cert_bundDE
Mattermost Mattermost≤ 0 ≤5.0.13enisa_euvdEU
mattermost mattermost desktop< 5.13.1.0nvdUScpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2056Mattermost Desktop: Schwachstellen ermöglichten Denial of ServiceDeutsch2025-09-15csaf · cert_bundDE
Ein Angreifer kann eine Schwachstelle in Mattermost Desktop ausnutzen, um einen Denial of Service zu verursachen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2025-10-16modified 2026-10-19

references (4)

External citations — patches, advisories, analysis.

scry

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