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Couchbase ServerApplication · Couchbase

CVE-2023-28470

MEDIUM · 5.3 CVSS v3.1 Published 2023-03-23
Fix available
A fix is available. Upgrade to 7.1.4 or later.
See remediation →
62/100
Remediation priority · Elevated
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
In Couchbase Server 5 through 7 before 7.1.4, the nsstats endpoint is accessible without authentication.

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 nsstats endpoint in Couchbase Server versions 5 through 7 (before 7.1.4) lacks authentication requirements, allowing unauthenticated remote attackers to access sensitive operational statistics and potentially gather information for further attacks.

MitigationUpgrade Couchbase Server to version 7.1.4 or later, or implement network-level access controls to restrict the nsstats endpoint to authenticated/authorized users only.

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
Couchbase ServerApplication
Affected:>= 6.6.0, < 7.1.4

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
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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. Identify Couchbase Server version
    Run the command 'couchbase-cli server-info' from the Couchbase installation bin directory, or query the REST API endpoint http://localhost:8091/pools/default with appropriate credentials to retrieve server version information
    Affected if The installed version is >= 6.6.0 and < 7.1.4
  2. Confirm the nsstats endpoint is reachable
    Send an HTTP GET request to http://<server>:8091/nsstats without providing any authentication credentials or session cookies
    Affected if The endpoint returns HTTP 200 with operational statistics data (such as 'ops', 'curr_items', 'disk_size' metrics) without requiring authentication
  3. Verify network exposure of the nsstats endpoint
    Check if port 8091 (or custom port if modified) is accessible from untrusted network interfaces by performing a curl request from an external host or reviewing firewall rules
    Affected if The nsstats endpoint responds to requests from network addresses that should not have unrestricted access to internal management interfaces

A user is affected if Couchbase Server version is 6.6.0 or higher but below 7.1.4 AND the nsstats endpoint at port 8091 responds with operational statistics without any authentication credentials.

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 7.1.4 or later
Fixed in 7.1.4
Interim mitigation

Upgrade Couchbase Server to version 7.1.4 or later, or implement network-level access controls to restrict the nsstats endpoint to authenticated/authorized users only.

Recommended fix High confidence

7.1.4 or later (7.2.x, 7.6.x recommended for latest features and security fixes)

  1. Back up all Couchbase Server data and configuration files before initiating the upgrade
  2. Review the Couchbase Server upgrade documentation for your current version to ensure compatibility with version 7.1.4
  3. Stop all Couchbase Server services and applications connected to the database
  4. Upgrade Couchbase Server to version 7.1.4 or a later stable release (7.2.0, 7.6.0, etc.)
  5. After upgrading, restart all Couchbase Server services
  6. Verify that the nsstats endpoint now requires authentication by attempting an unauthenticated request (this should now fail)
  7. Confirm authenticated requests to nsstats work correctly
  8. Test critical database operations to ensure the upgrade did not break existing functionality
Caveat Review Couchbase release notes for breaking changes between 6.6.x-7.1.x and 7.1.4+; some query optimizer settings and index definitions may need adjustment

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

Fix this in Couchbase Server Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.

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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-2023-28470 in production — separate from our analysis above.

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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