dbcve.org
ConfluenceApplication · Mattermost

CVE-2025-48731

MEDIUM · 6.4 CVSS v3.1 Published 2025-08-11
Fix available
A fix is available. Upgrade to 1.5.0 or later.
See remediation →
70/100
Remediation priority · Elevated
Remotely reachable 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 access of the user to the Confluence space which allows attackers to edit a subscription for a Confluence space the user does not have access for via edit 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 · moderate confidence

The Mattermost Confluence Plugin versions before 1.5.0 contain an authorization bypass vulnerability in the edit subscription endpoint. The plugin fails to verify that the user has proper access permissions to the Confluence space before allowing subscription edits, enabling authenticated users to modify subscriptions for spaces they do not have access to.

MitigationUpgrade the Mattermost Confluence Plugin to version 1.5.0 or later which includes proper access control validation for Confluence space subscriptions.

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
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/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
    Access Mattermost System Console > Plugins > Plugin Management and verify the Confluence plugin appears in the list of installed plugins
    Affected if The Confluence plugin is not listed in installed plugins, then this CVE does not apply
  2. Identify the installed Confluence plugin version
    In the same Plugins > Plugin Management page, locate the Confluence plugin and note the version number displayed
    Affected if The installed version is any version before 1.5.0 (e.g., 1.4.0, 1.3.0, etc.)
  3. Verify Confluence spaces are configured
    Navigate to the plugin configuration or settings for the Confluence plugin and check if any Confluence spaces have been added for integration
    Affected if No Confluence spaces are configured, the subscription endpoint vulnerability cannot be exploited
  4. Confirm subscription functionality is enabled
    Check if the subscription feature for Confluence spaces is active in the plugin settings or if users have created subscriptions to Confluence content
    Affected if The edit subscription endpoint is accessible and subscriptions exist, an authenticated user with limited permissions could exploit the authorization bypass

You are affected if the Mattermost Confluence Plugin is installed with a version lower than 1.5.0 and Confluence spaces with active subscriptions are configured in your environment.

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 access control validation for Confluence space subscriptions.

Recommended fix Moderate confidence

Mattermost Confluence Plugin version 1.5.0

  1. Log in to the Mattermost system as an administrator with permissions to manage plugins
  2. Navigate to the Mattermost System Console > Plugins > Plugin Management
  3. Locate the Confluence plugin in the list of installed plugins
  4. Click on the plugin to view its details and current version
  5. If the installed version is below 1.5.0, click the option to update or upgrade the plugin
  6. Confirm the upgrade to ensure the plugin is updated to version 1.5.0 or later
  7. After upgrade, verify the plugin is functioning correctly and test that authorization checks are now properly enforced
  8. Review Mattermost logs to confirm no errors related to the plugin upgrade

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

Fix this in Confluence Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,770
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,832.

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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-2025-48731 in production — separate from our analysis above.

No notes yet

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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