Security readout for executives and security teams
Plain-English summary
This flaw affects Couchbase Server 6.5.x and 6.6.x through 6.6.2. Externally managed users may be allowed to authenticate with an empty password, creating a potential unauthorized access risk where external identity controls are misconfigured or permissive.
Executive priority
Treat this as a targeted database access-control risk, not a confirmed internet-wide emergency. Prioritize environments running the named Couchbase versions with external authentication enabled.
Technical view
CVE-2021-35943 is an incorrect access control issue involving externally managed Couchbase users and empty-password authentication behavior, referenced against RFC4513. The provided sources do not include CVSS, CWE, exploit details, or a named fixed release beyond the affected version range.
Likely exposure
Exposure is most likely where Couchbase Server 6.5.x or 6.6.x through 6.6.2 uses externally managed users, such as directory-backed authentication.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The practical risk depends on external identity configuration and whether empty passwords could be accepted.
Researcher notes
Evidence is limited to the CVE description and vendor reference links. No CVSS vector, CWE mapping, patch statement, exploit status, or detailed advisory text is included in the provided bundle.
Mitigation direction
- Inventory Couchbase Server versions and prioritize 6.5.x or 6.6.x through 6.6.2.
- Review Couchbase release notes and alerts for vendor-confirmed fixed versions or workarounds.
- Enforce non-empty passwords in the external identity provider or directory service.
- Review externally managed Couchbase user configuration for permissive authentication behavior.
- Plan an upgrade path using current Couchbase vendor guidance.
Validation and detection
- Confirm whether affected Couchbase versions are deployed.
- Identify clusters using externally managed users.
- Verify external identity policy rejects empty passwords.
- Review authentication logs for anomalous externally managed user access.
- Document compensating controls until vendor guidance is applied.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-35943 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.couchbase.com/server/current/release-notes/relnotes.htmlCVE reference · x_refsource_MISC
- https://www.couchbase.com/alertsCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.