CVE-2021-43963
8.1 · HIGHOverview
CVE-2021-43963 is a high-severity vulnerability affecting couchbase sync_gateway. It was published on December 7, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
An issue was discovered in Couchbase Sync Gateway 2.7.0 through 2.8.2. The bucket credentials used to read and write data in Couchbase Server were insecurely being stored in the metadata within sync documents written to the bucket. Users with read access could use these credentials to obtain write access. (This issue does not affect clusters where Sync Gateway is authenticated with X.509 client certificates. This issue also does not affect clusters where shared bucket access is not enabled on Sync Gateway.)
Remediation
Check the references section for vendor advisories and patches from couchbase. Update sync_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| couchbase | sync_gateway | >= 2.7.0, < 2.8.3 | Affected |
Frequently Asked Questions
What is CVE-2021-43963?
CVE-2021-43963 is a high-severity vulnerability affecting couchbase sync_gateway. It was published on December 7, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2021-43963?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-43963?
Check the references section for vendor advisories and patches from couchbase. Update sync_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-43963?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-43963 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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