An issue was discovered in Couchbase Server 6.x through 6.6.1.

published 2021-05-19 5y ago modified 2026-06-17 4mo ago also EUVD-2021-14644

cvss: 5.9; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

An issue was discovered in Couchbase Server 6.x through 6.6.1. The Couchbase Server UI is insecurely logging session cookies in the logs. This allows for the impersonation of a user if the log files are obtained by an attacker before a session cookie expires.

Patch / fix

fixed in 1

couchbase couchbase_server 6.6.2

Is CVE-2021-27924 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-319 Cleartext Transmission of Sensitive Information

References

couchbase.com /resources/security#SecurityAlerts
vendor-advisory
couchbase.com /downloads
product, vendor-advisory

Sources

CVE List CVE-2021-27924
NVD CVE-2021-27924

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