{"cve":"CVE-2021-36806","nvd":{"published":"2023-11-30T10:15:07.183","modified":"2026-06-17T03:59:28.153","status":"Modified","description":"A reflected XSS vulnerability allows an open redirect when the victim clicks a malicious link to an error page on \n\nSophos Email Appliance \n\nolder than version 4.5.3.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://community.sophos.com/email-appliance/b/blog/posts/sophos-email-appliance-version-4-5-3-4-released","https://community.sophos.com/email-appliance/b/blog/posts/sophos-email-appliance-version-4-5-3-4-released"],"products":["sophos:email_appliance"],"source":"nvd","synced_at":"2026-10-19T21:42:07.670898610+00:00"},"epss":{"cve":"CVE-2021-36806","score":0.00432,"percentile":0.37554,"date":"2026-11-01"},"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."]}