CVE-2021-42763Network attack vector

Credential disclosure via unredacted backtrace headers

Published Nov 2, 2021 · Updated Aug 4, 2024

Cleartext credential storage in Couchbase Server before 6.6.3 and 7.x before 7.0.2 allows attackers to read node credentials. When the cluster manager forwards a pluggable UI request, collected process information records its Basic Authentication header without redacting the node credentials. Exposure requires the process information to be captured while that request is being serviced and the resulting diagnostic logs to be obtained.

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

Cleartext credential storage in Couchbase Server before 6.6.3 and 7.x before 7.0.2 allows attackers to read node credentials. When the cluster manager forwards a pluggable UI request, collected process information records its Basic Authentication header without redacting the node credentials. Exposure requires the process information to be captured while that request is being serviced and the resulting diagnostic logs to be obtained.

The record

CVE
CVE-2021-42763
Published
Nov 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-312, T1555.003
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

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1555.003Credentials from Password Stores: Credentials from Web Browsers

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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