CVE-2021-37842Network attack vector

Credential disclosure via debug-log tombstone entry

Published Nov 2, 2021 · Updated Aug 4, 2024

Couchbase Server 7.0.0 and 7.0.1 contain a cleartext storage flaw that allows remote attackers to obtain XDCR credentials through debug logs. The metakv configuration logger records keys carrying tombstone-purger timestamps without redacting associated remoteCluster credential values. An attacker needs access to server debug-log output; the demonstrated consequence is credential confidentiality loss, with no evidence of direct data modification or service interruption.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Couchbase Server 7.0.0 and 7.0.1 contain a cleartext storage flaw that allows remote attackers to obtain XDCR credentials through debug logs. The metakv configuration logger records keys carrying tombstone-purger timestamps without redacting associated remoteCluster credential values. An attacker needs access to server debug-log output; the demonstrated consequence is credential confidentiality loss, with no evidence of direct data modification or service interruption.

The record

CVE
CVE-2021-37842
Published
Nov 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-312, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1552.001Credentials In Files

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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