{"schema":"threatline.record/2","record":{"id":"CVE-2021-21973","aliases":[],"summary":"VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability","details":"VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.","categories":["Containers & cloud"],"product":"vCenter Server and Cloud Foundation","vendor":"VMware","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-21973","source_modified_at":"2025-10-21T23:25:54.167Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"VMware vCenter Server","vendor":"n/a","versions":[{"status":"affected","version":"7.x before 7.0 U1c"},{"status":"affected","version":"6.7 before 6.7 U3l"},{"status":"affected","version":"6.5 before 6.5 U3n"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-21973","source_modified_at":"2025-10-21T23:25:54.167Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"VMware Cloud Foundation","vendor":"n/a","versions":[{"status":"affected","version":"4.x before 4.2"},{"status":"affected","version":"3.x before 3.10.1.2"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":true,"date_added":"2022-03-07","due_date":"2022-03-21","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.88012,"percentile":0.99767,"score_date":"2026-10-23"},"published_at":"2021-02-24T16:42:02.000Z","modified_at":"2025-10-21T23:25:54.167Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-21973","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:25:54.167Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21973.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-21973","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21973","source":"CISA KEV"},{"source":"CVE List","url":"https://www.vmware.com/security/advisories/VMSA-2021-0002.html","tags":["x_refsource_CONFIRM","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21973","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"partial","assessed_at":"2024-02-16T16:16:46.429372Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"VMware vSphere - Server-Side Request Forgery","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21973.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:25:54.167Z","content_hash":"87fb702303e9cafbcfe957cf6d5f5a7651d266f1c2440eb8207255489515a3e2"}}