Mattermost Desktop App up to 5.x log file

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Mattermost Desktop App up to 5.x. This affects an unknown part. The manipulation leads to log file. This vulnerability is documented as CVE-2025-13321. The attack needs to be performed locally. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost Desktop App up to 5.x. It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a log file vulnerability. Using CWE to declare the problem leads to CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Impacted is confidentiality. The summary by CVE is:

Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.

The weakness was released by Doyensec. It is possible to read the advisory at mattermost.com. The identification of this vulnerability is CVE-2025-13321 since 11/17/2025. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 282320 (Mattermost Desktop < 6.0.0 (MMSA-2025-00520)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (282320) and CERT Bund (WID-SEC-2025-2880). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Mattermost Mattermost

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector (Mattermost): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Log file
CWE: CWE-532 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282320
Nessus Name: Mattermost Desktop < 6.0.0 (MMSA-2025-00520)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Desktop App 6.0.0

Timelineinfo

11/17/2025 CVE reserved
12/17/2025 +30 days Advisory disclosed
12/17/2025 +0 days VulDB entry created
02/27/2026 +72 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Doyensec
Status: Confirmed

CVE: CVE-2025-13321 (🔒)
GCVE (CVE): GCVE-0-2025-13321
GCVE (VulDB): GCVE-100-337031
CERT Bund: WID-SEC-2025-2880 - Mattermost Server und Desktop: Mehrere Schwachstellen

Entryinfo

Created: 12/17/2025 21:30
Updated: 02/27/2026 13:59
Changes: 12/17/2025 21:30 (65), 12/18/2025 18:02 (7), 01/07/2026 21:55 (2), 02/27/2026 13:59 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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