{"id":"CVE-2021-36806","aliases":["EUVD-2021-23382","GHSA-f39q-q9f3-6vmw"],"status":"published","title":"A reflected XSS vulnerability allows an open redirect when the victim clicks a malicious link to...","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.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00432,"percentile":0.38006,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2023-11-30T09:41:31Z","modified":"2026-06-17T03:59:28Z","products":[{"vendor":"sophos","product":"email_appliance"},{"vendor":"sophos","product":"sophos email appliance"}],"references":[{"url":"https://community.sophos.com/email-appliance/b/blog/posts/sophos-email-appliance-version-4-5-3-4-released","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36806"},{"url":"https://github.com/advisories/GHSA-f39q-q9f3-6vmw"}],"sources":{"cve":[{"id":"CVE-2021-36806","description":"\nA 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.\n\n","status":"published","published":"2023-11-30T09:41:31.38Z","modified":"2024-12-02T18:09:46.06Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-23382","description":"\nA 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.\n\n","status":"published","published":"2023-11-30T09:41:31Z","modified":"2024-12-02T18:09:46Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:43.613884Z"}],"ghsa":[{"id":"GHSA-f39q-q9f3-6vmw","title":"\nA reflected XSS vulnerability allows an open redirect when the victim clicks a malicious link to...","description":"\nA 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.\n\n","status":"published","published":"2023-11-30T12:30:18Z","modified":"2023-11-30T12:30:19Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:55:07.446793Z"}],"nvd":[{"id":"CVE-2021-36806","description":"\nA 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.\n\n","status":"published","published":"2023-11-30T10:15:07.183Z","modified":"2026-06-17T03:59:28.153Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}