CVE-2024-45843
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 versions 9.5.x <= 9.5.8 fail to include the metadata endpoints of Oracle Cloud and Alibaba in the SSRF denylist, which allows an attacker to possibly cause an SSRF if Mattermost was deployed in Oracle Cloud or Alibaba.
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 confidenceMattermost versions 9.5.x through 9.5.8 fail to include Oracle Cloud and Alibaba Cloud metadata endpoints in the SSRF denylist, allowing attackers to potentially induce the server to make requests to cloud provider metadata services (e.g., 169.254.169.254) when Mattermost is deployed on these platforms.
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>= 9.5.0, < 9.5.9CVSS 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
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 checksWork through these to decide whether this CVE applies to you.
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Check Mattermost Server versionRun 'mattermost version' or check the version displayed in the system console under About > Mattermost. Compare the version number to the affected range 9.5.0 through 9.5.8.Affected if The installed version is 9.5.0, 9.5.1, 9.5.2, 9.5.3, 9.5.4, 9.5.5, 9.5.6, 9.5.7, or 9.5.8.
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Identify hosting platformCheck the cloud environment where Mattermost is deployed. This may be visible in your infrastructure documentation, cloud console, or by inspecting network configuration for metadata endpoint access.Affected if Mattermost Server is running on Oracle Cloud Infrastructure (OCI) or Alibaba Cloud.
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Confirm SSRF denylist configurationLocate the SSRF denylist configuration in Mattermost settings or config file. Verify whether the denylist includes entries blocking access to Oracle Cloud metadata endpoints (169.254.169.254 for Oracle) and Alibaba Cloud metadata endpoints.Affected if The SSRF denylist is not configured or does not explicitly block cloud provider metadata IP addresses (such as 169.254.169.254) for the relevant cloud platform.
You are affected if Mattermost Server version is 9.5.0-9.5.8 AND the server is deployed on Oracle Cloud or Alibaba Cloud AND the SSRF denylist does not block the cloud metadata endpoints.
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 · scoped9.5.9
Upgrade to Mattermost version 9.5.9 or later, or explicitly configure the SSRF denylist to block Oracle Cloud and Alibaba Cloud metadata endpoints.
9.5.9 (or latest 9.5.x release)
- Upgrade Mattermost Server from any version >= 9.5.0 and < 9.5.9 to version 9.5.9 or later
- Restart the Mattermost Server service after upgrading
- Verify the upgrade was successful by checking the server version in the system console
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-45843 — 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-2024-45843 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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- 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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