{"cve_id":"CVE-2021-21973","published":"2021-02-24T17:15:15.923000+00:00","last_modified":"2026-06-17T03:36:28.910000+00:00","vuln_status":"Analyzed","description":"The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","base_score":5.3,"base_severity":"MEDIUM","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"LOW","impact_i":"NONE","impact_a":"NONE","cwe_ids":["CWE-918"],"in_kev":true,"kev_date_added":"2022-03-07","kev_ransomware":false,"epss_score":0.88012,"epss_percentile":0.99764,"cap_rule_version":"0.1.1","stage":"RECON","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"NONE","caps":["INFO_DISCLOSURE","LATERAL"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:34:18.848181+00:00","first_seen":"2021-02-24T17:15:15.923000+00:00","kev_first_seen":"2022-03-07T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["vmware"],"products":["cloud_foundation","vcenter_server"],"affected":[{"vendor":"vmware","product":"cloud_foundation","ranges":["≥ 3.0 and < 3.10.1.2","≥ 4.0 and < 4.2"]},{"vendor":"vmware","product":"vcenter_server","ranges":["6.5","6.7","7.0"]}]}