{"basis":"claimed","id":"CVE-2021-21973","name":"VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability","vendorProject":"VMware","product":"vCenter Server and Cloud Foundation","publishedAt":"2021-02-24","cvss":{"score":5.3,"severity":"MEDIUM","version":"3.1"},"exploited":{"kevAdded":"2022-03-07","dueDate":"2022-03-21","ransomware":false},"epss":{"score":0.88012,"percentile":0.99764,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"no_history","firstOn":null,"daysToRule":null},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"no_history","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"rule","firstOn":"2023-08-08","daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"no_history","firstOn":null,"daysToRule":null}},"title":null,"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).","cwes":["CWE-20","CWE-918"],"vendors":[{"vendor":"cloudflare","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"rule","basis":"claimed","firstOn":"2023-08-08","firstIsNew":false,"daysToRule":null,"daysAtMost":895,"freePlan":false,"claims":[{"id":"52357ef3aa3f438ff1facc09597558ae54e1f91627e8554f1c55a904b5284552","cve_id":"CVE-2021-21973","vendor":"f5","product":"Attack signatures","rule_id":"200014017","rule_name":"VMware vCenter vcIP SSRF","change":"updated","default_action":null,"published_on":"2023-08-08","source_url":"https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog","source_title":"F5 Distributed Cloud attack signatures changelog","excerpt":"Updated: signature 200014017 \"VMware vCenter vcIP SSRF\" (Abuse of Functionality, risk High), systems: Microsoft Windows, Java Servlets/JSP. References: CVE-2021-21973.","first_seen_at":"2026-11-02T21:00:28.306Z"},{"id":"eeb9babaae9128a0d4ffc6a1fe8ac55f5aa7063cd473a89cb2dc51f7985a02fe","cve_id":"CVE-2021-21973","vendor":"f5","product":"Attack signatures","rule_id":"200014017","rule_name":"VMware vCenter vcIP SSRF","change":"updated","default_action":null,"published_on":"2023-09-12","source_url":"https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog","source_title":"F5 Distributed Cloud attack signatures changelog","excerpt":"Updated: signature 200014017 \"VMware vCenter vcIP SSRF\" (Abuse of Functionality, risk High), systems: Microsoft Windows, Java Servlets/JSP. References: CVE-2021-21973.","first_seen_at":"2026-11-02T21:00:28.306Z"}]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-03T04:17:40.955Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","ssvc":{"exploitation":"active","automatable":"yes","technicalImpact":"partial"},"measured":[{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 1, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:02:57.000Z","verdict":"passed","templateId":"CVE-2021-21973","templatePath":"http/cves/2021/CVE-2021-21973.yaml","requests":1,"blockedRequests":0,"rules":[],"note":"","requestDetail":[{"method":"GET","path":"/ui/vropspluginui/rest/services/getvcdetails","status":200,"blocked":false,"rules":[]}]},{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 2, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:03:28.000Z","verdict":"passed","templateId":"CVE-2021-21973","templatePath":"http/cves/2021/CVE-2021-21973.yaml","requests":1,"blockedRequests":0,"rules":[],"note":"","requestDetail":[{"method":"GET","path":"/ui/vropspluginui/rest/services/getvcdetails","status":200,"blocked":false,"rules":[]}]}],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-21","posts":0},{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0}],"top_posts":[],"exploit_repositories":[]}}