CVE-2025-55035 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0004.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

Update Mattermost Desktop App to versions 5.13.1 or higher.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://mattermost.com/security-updates

History

Thu, 16 Oct 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 16 Oct 2025 15:30:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		Mattermost Desktop DoS when user has basic authentication server configured
Weaknesses		CWE-754
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H'}`

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-10-16T15:18:25.389Z

Updated: 2025-10-16T16:28:05.951Z

Reserved: 2025-09-11T18:33:39.530Z

Link: CVE-2025-55035

Vulnrichment

Updated: 2025-10-16T16:27:51.175Z

NVD

Status : Received

Published: 2025-10-16T16:15:38.403

Modified: 2025-10-16T16:15:38.403

Link: CVE-2025-55035

Redhat

No data.

OpenCVE Enrichment

No data.

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