dbcve.org
ConfluenceApplication · Mattermost

CVE-2025-44004

HIGH · 7.2 CVSS v3.1 Published 2025-08-11
Fix available
A fix is available. Upgrade to 1.5.0 or later.
See remediation →
81/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subscription endpoint.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The Mattermost Confluence Plugin versions prior to 1.5.0 lack proper authorization validation when processing requests to create channel subscriptions. This allows unauthenticated or unauthorized attackers to directly invoke the channel subscription API endpoint and create subscriptions without proving they have valid access to the Mattermost instance.

MitigationUpgrade the Mattermost Confluence Plugin to version 1.5.0 or later which includes proper user authorization verification before processing channel subscription API requests.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ConfluenceApplication
Affected:< 1.5.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Mattermost Confluence Plugin is installed
    Navigate to Mattermost System Console > Plugins > Plugin Management and verify the Confluence plugin appears in the list of installed plugins, or query the Mattermost API endpoint /api/v4/plugins for plugin status
    Affected if The Confluence plugin is present and enabled in the Mattermost instance
  2. Identify the installed version of the Confluence plugin
    In the Mattermost System Console under Plugins > Plugin Management, locate the Confluence plugin entry and note the version number displayed, or retrieve via the API at /api/v4/plugins/{plugin_id}
    Affected if The installed version is lower than 1.5.0 (e.g., 1.4.0, 1.3.0, etc.)
  3. Verify channel subscription functionality exists
    Check the Confluence plugin configuration or documentation to confirm the channel subscription feature is available in the installed version, typically found under Plugin Settings > Confluence > Channel Subscriptions
    Affected if Channel subscription functionality is enabled or configurable in the plugin
  4. Test for unauthenticated API access
    Send a direct HTTP POST request to the plugin subscription endpoint (typically /plugins/com.mattermost.confluence/subscription) without providing valid Mattermost authentication headers and observe the response
    Affected if The request is processed without returning an authentication or authorization error (401/403)

The environment is affected if the Mattermost Confluence Plugin versions prior to 1.5.0 is installed and the channel subscription API endpoint accepts requests without proper authorization validation.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.5.0 or later
Fixed in 1.5.0
Interim mitigation

Upgrade the Mattermost Confluence Plugin to version 1.5.0 or later which includes proper user authorization verification before processing channel subscription API requests.

Recommended fix High confidence

Mattermost Confluence Plugin version 1.5.0

  1. Identify the current version of the Mattermost Confluence Plugin installed in the Mattermost instance
  2. Upgrade the Mattermost Confluence Plugin to version 1.5.0 or later
  3. Verify the upgrade was successful and the plugin is functioning correctly

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Confluence Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
9.0 hours of engineering $1,570
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,512.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2025-44004 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-44004 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data