ConfluenceApplication · Mattermost
CVE-2025-54525
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 · uneditedMattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to create channel subscription endpoint with an invalid request body.
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 confidenceThe Mattermost Confluence Plugin versions prior to 1.5.0 contain an input validation vulnerability in the create channel subscription endpoint. The plugin fails to properly handle unexpected or malformed request bodies, allowing unauthenticated attackers to repeatedly send invalid requests that cause the plugin to crash.
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
< 1.5.0CVSS 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
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 checksWork through these to decide whether this CVE applies to you.
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Identify if Confluence plugin is installedIn Mattermost, go to Product menu > Integrations > Plugin Management, or use the mmctl plugin list command if you have CLI access. Look for an entry named 'Confluence' or 'mattermost-confluence-plugin'.Affected if The Confluence plugin does not appear in the installed plugins list, meaning the vulnerability does not apply.
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Locate the installed plugin versionIn the Mattermost Plugin Management UI, click on the Confluence plugin to view its details including the version number. Alternatively, run 'mmctl plugin get <plugin_id>' to retrieve version information.Affected if No version information is displayed or the plugin cannot be found.
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Compare version to affected rangeCheck the version number against the affected range: versions prior to 1.5.0 are vulnerable. The format is typically '1.x.x' - if the first number is less than 1, or if it is 1.x.x where x.x is less than 5.0, the installation is affected.Affected if The installed version is 1.4.x, 1.3.x, 1.2.x, or any version where the minor version is below 5 (e.g., 1.4.0, 1.3.1, 1.0.0).
A user is affected if the Mattermost Confluence Plugin is installed and its version is lower than 1.5.0.
Generated from the published advisory. Verify against your own configuration.
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 · scoped1.5.0
Upgrade the Mattermost Confluence Plugin to version 1.5.0 or later which includes proper request body validation to prevent the crash condition.
Mattermost Confluence Plugin version 1.5.0
- Log in to Mattermost as a system administrator
- Navigate to System Console > Plugins > Plugin Management
- Locate the Mattermost Confluence plugin in the list
- Click on the upgrade button or upload the version 1.5.0 plugin package
- Verify the plugin is upgraded to version 1.5.0 or later
- Test that the create channel subscription endpoint handles request bodies 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 / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-54525 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-54525 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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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.
- 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
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