Auth bypass in Couchbase Server
CVE-2019-11496
In versions of Couchbase Server prior to 5.0, the bucket named "default" was a special bucket that allowed read and write access without authentication. As part of 5.0, the behavior of all buckets including "default" were changed to only allow access by authenticated users with sufficient authorization. However, users were allowed unauthenticated and unauthorized access to the "default" bucket if the properties of this bucket were edited. This has been fixed in versions 5.1.0 and 5.5.0.
Vulnerability class: Broken Authentication
EPSS: 0.014 (70.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Couchbase Couchbase_server
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-11496?
- CVE-2019-11496 is a critical-severity vulnerability in Couchbase Server, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2019-09-10.
- How severe is CVE-2019-11496?
- Critical severity. CVSS v3 base score is 9.1 out of 10.