ConfluenceApplication · Mattermost
CVE-2025-53514
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 server webhook 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 before 1.5.0 fail to properly validate incoming request bodies on the server webhook endpoint. Attackers can crash the plugin by sending malformed/invalid request bodies, causing a denial of service condition.
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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:H/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 Mattermost Confluence Plugin is installedCheck your Mattermost instance for installed plugins, specifically look for the Confluence plugin in the plugin management console or configuration filesAffected if The Confluence plugin is not installed on the Mattermost server
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Determine the installed version of the Confluence pluginAccess the plugin information panel in Mattermost or inspect the plugin manifest/metadata to retrieve the exact version numberAffected if The installed version is any version prior to 1.5.0 (for example, 1.4.0, 1.3.0, etc.)
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Verify if the Confluence webhook endpoint is exposedCheck the plugin configuration settings or examine the network configuration to determine if the webhook endpoint is publicly or externally accessibleAffected if The webhook endpoint is exposed and reachable from untrusted networks
You are affected if the Mattermost Confluence Plugin is installed with a version lower than 1.5.0 and its webhook endpoint is accessible to attackers who could send malformed request bodies.
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. If immediate upgrade is not possible, consider restricting access to the webhook endpoint via network or authentication controls.
Mattermost Confluence Plugin version 1.5.0 or later
- 1. Navigate to the Mattermost System Console and access the Plugin Management section.
- 2. Locate the Confluence plugin in the list of installed plugins.
- 3. Upgrade the Mattermost Confluence Plugin to version 1.5.0 or later.
- 4. Verify the upgrade was successful by confirming the installed version shows 1.5.0 or higher.
- 5. Test the Confluence webhook endpoint to ensure it properly handles request bodies without crashing.
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Confluence
Scoped from the published advisory
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 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 $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-53514 — 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-2025-53514 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
- No spam, self-promotion, credentials, or personal data