CVE-2021-33504Network attack vector

Cluster-secret disclosure via untrusted node addition

Published May 31, 2022 · Updated Aug 3, 2024

Couchbase Server before 7.1.0 allows remote authenticated users to expose a cluster secret via manipulated untrusted-node addition. The node-join workflow can transmit the cluster cookie to an untrusted node when an administrator adds it without certificate-based trust validation. Exploitation requires administrator control of node-addition operations and results in disclosure of credentials used to protect cluster communications, without reported data modification or service interruption.

CVSS severity4.9
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Couchbase Server before 7.1.0 allows remote authenticated users to expose a cluster secret via manipulated untrusted-node addition. The node-join workflow can transmit the cluster cookie to an untrusted node when an administrator adds it without certificate-based trust validation. Exploitation requires administrator control of node-addition operations and results in disclosure of credentials used to protect cluster communications, without reported data modification or service interruption.

The record

CVE
CVE-2021-33504
Published
May 31, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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