{"cve":"CVE-2021-21993","nvd":{"published":"2021-09-23T12:15:07.600","modified":"2026-06-17T03:36:31.163","status":"Modified","description":"The vCenter Server contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in vCenter Server Content Library. An authorised user with access to content library may exploit this issue by sending a POST request to vCenter Server leading to information disclosure.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-918"],"references":["https://www.vmware.com/security/advisories/VMSA-2021-0020.html","https://www.vmware.com/security/advisories/VMSA-2021-0020.html"],"products":["vmware:cloud_foundation","vmware:vcenter_server"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-21993","score":0.00938,"percentile":0.60879,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}