What is CVE-2021-25644?

CVE-2021-25644 is a high-severity vulnerability in Couchbase Server, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2021-05-19.

How severe is CVE-2021-25644?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Couchbase Server

CVE-2021-25644

An issue was discovered in Couchbase Server 5.x and 6.x through 6.6.1 and 7.0.0 Beta. Incorrect commands to the REST API can result in leaked authentication information being stored in cleartext in the debug.log and info.log files, and is also shown in the UI visible to administrators.

Published 2021-05-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Couchbase Server — versions 7.0.0

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

www.couchbase.com/resources/security (Vendor Advisory)
www.couchbase.com/downloads (Product, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25644?: CVE-2021-25644 is a high-severity vulnerability in Couchbase Server, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2021-05-19.
How severe is CVE-2021-25644?: High severity. CVSS v3 base score is 7.5 out of 10.