# CVE-2025-13321: mattermost-desktop (Low 3.3)

📦

📦 npm

Not in CISA KEV

LOW severity

# CVE-2025-13321 — mattermost-desktop

LOW [Fix: mattermost/desktop@722938b](https://github.com/mattermost/desktop/commit/722938bb6a97e8b8a5678e6858e44c4d505c08ee)

CVE-2025-13321 is a low-severity (CVSS 3.3) CWE-532 vulnerability in mattermost-desktop. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Mattermost Desktop App logging sensitive information and fails to clear data on server deletion

Also known as[GHSA-g6qx-wq5w-wr8v](/vulnerability/GHSA-g6qx-wq5w-wr8v)

Published

Dec 17, 2025

Updated

Oct 28, 2026

Affected

1 pkg

Patched

See advisory

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

## Exploitation Status

### No confirmed exploitation observed yet

-   CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-13321.

## EPSS Exploitation Probability

[via FIRST.org ↗](https://www.first.org/epss/)

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs2th percentile — riskier than 2% of all scored CVEsHighest risk

0.00%0.21%0.41%0.62%0.0%0.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/).

## How urgent is this, really

## Where this sits among everything scored

## Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

`mattermost-desktop`npm

25downloads / week

## Description

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.

A fix is available for direct download via the [Mattermost Desktop](https://github.com/mattermost/desktop/releases/tag/v6.0.0) repository, but it has not been uploaded to the npm registry at time of publication.

## Affected Packages

1 total

Ecosystem

Package

Vulnerable range

Fix

📦npm

`mattermost-desktop` 

all versions

No fix

## Affected Products

1 product · 1 configurations

Application

`mattermost desktop`mattermost

< 6.0.0

range

## Detection & mitigation playbook

Open-source dependency

1.  ### Detect
    
    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mattermost-desktop, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
    
2.  ### Remediation status
    
    The records we use list no patched version of mattermost-desktop for CVE-2025-13321. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
    
3.  ### Mitigate without a patch
    
    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
    

## Frequently Asked Questions

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. A fix is available for direct download via the \[Mattermost Desktop\](https://github.com/mattermost/desktop/releases/tag/v6.0.0) repository, but it has not been uploaded to the npm registry at time of publication.

O3 Security · Impact-Aware SCA

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