What’s Vulnerable › Vulnerabilities

CVE-2021-42763

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-02 · updated 2026-06-17
• Weakness: CWE-312

Description

Couchbase Server before 6.6.3 and 7.x before 7.0.2 stores Sensitive Information in Cleartext. The issue occurs when the cluster manager forwards a HTTP request from the pluggable UI (query workbench etc) to the specific service. In the backtrace, the Basic Auth Header included in the HTTP request, has the "@" user credentials of the node processing the UI request.

Affected products

• Couchbase Server: before 4.6.0; from 5.0.0 before 6.1.0; from 6.5.0 through 6.6.2; 7.0.0, 7.0.1 — fixed in 4.6.0, 6.1.0

How to fix

Upgrade to a fixed version: Couchbase Server 4.6.0, 6.1.0. Check the vendor advisory for mitigations.

References

• https://docs.couchbase.com/server/current/release-notes/relnotes.html
• https://www.couchbase.com/alerts
• https://docs.couchbase.com/server/current/release-notes/relnotes.html
• https://www.couchbase.com/alerts

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