{"cve":"CVE-2021-22017","nvd":{"published":"2021-09-23T13:15:08.207","modified":"2026-06-17T03:36:33.670","status":"Analyzed","description":"Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":[],"references":["https://www.vmware.com/security/advisories/VMSA-2021-0020.html","https://www.vmware.com/security/advisories/VMSA-2021-0020.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017"],"products":["vmware:vcenter_server"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-22017","score":0.49177,"percentile":0.98885,"date":"2026-10-31"},"kev":{"cve":"CVE-2021-22017","date_added":"2022-01-10","due_date":"2022-01-24","vendor":"VMware","product":"vCenter Server","known_ransomware":false},"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."]}