VDB-328135 · CVE-2025-58084 · EUVD-2025-34084

Mattermost Desktop App up to 5.13.0 URL improper validation of specified type of input

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Mattermost Desktop App up to 5.13.0 and classified as problematic. Impacted is an unknown function of the component URL Handler. This manipulation causes improper validation of specified type of input. This vulnerability is registered as CVE-2025-58084. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Mattermost Desktop App up to 5.13.0 and classified as problematic. Affected by this vulnerability is an unknown part of the component URL Handler. The manipulation with an unknown input leads to a improper validation of specified type of input vulnerability. The CWE definition for the vulnerability is CWE-1287. The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type. As an impact it is known to affect availability. The summary by CVE is:

Mattermost Desktop App versions <= 5.13.0 fail to validate URLs external to the configured Mattermost servers, allowing an attacker on a server the user has configured to crash the user's application by sending the user a malformed URL.

The weakness was published by Doyensec. It is possible to read the advisory at mattermost.com. This vulnerability is known as CVE-2025-58084 since 09/11/2025. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 5.13.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-34084) and CERT Bund (WID-SEC-2025-2056). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Mattermost Mattermost

Productinfo

Type

Groupware Software

Vendor

Mattermost

Name

Desktop App

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 3.5
CNA Vector (Mattermost): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of specified type of input
CWE: CWE-1287 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Desktop App 5.13.1

Timelineinfo

09/11/2025 CVE reserved
10/13/2025 +32 days Advisory disclosed
10/13/2025 +0 days VulDB entry created
11/18/2025 +36 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Doyensec
Status: Confirmed

CVE: CVE-2025-58084 (🔒)
GCVE (CVE): GCVE-0-2025-58084
GCVE (VulDB): GCVE-100-328135
EUVD: 🔒
CERT Bund: WID-SEC-2025-2056 - Mattermost Desktop: Schwachstellen ermöglichten Denial of Service

Entryinfo

Created: 10/13/2025 22:42
Updated: 11/18/2025 20:43
Changes: 10/13/2025 22:42 (65), 10/14/2025 00:02 (1), 10/29/2025 21:36 (11), 11/18/2025 20:43 (7)
Complete: 🔍
Cache ID: 216::103