CVE-2021-25643: Couchbase Server

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in Couchbase Server 5.x and 6.x before 6.5.2 and 6.6.x before 6.6.2. Internal users with administrator privileges, @cbq-engine-cbauth and @index-cbauth, leak credentials in cleartext in the indexer.log file when they make a /listCreateTokens, /listRebalanceTokens, or /listMetadataTokens call.

Affected products

• Couchbase Couchbase Server: from 5.0.0, before 6.5.2 (fixed in 6.5.2); from 6.6.0, before 6.6.2 (fixed in 6.6.2)

Published 2021-05-26. Last modified 2026-06-17.