{"id":"CVE-2021-41349","aliases":["EUVD-2021-28378","GHSA-xjg9-924r-39mj"],"status":"published","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Microsoft Exchange Server Spoofing Vulnerability","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.93497,"percentile":0.99842,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2021-11-10T00:46:32Z","modified":"2026-08-19T18:31:37Z","exploits":[{"source":"nuclei","id":"CVE-2021-41349","title":"Microsoft Exchange Server Pre-Auth POST Based Cross-Site Scripting","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-41349.yaml"},{"source":"pocgithub","id":"0xrobiul/CVE-2021-41349","title":"0xrobiul/CVE-2021-41349","date":"2022-07-30","url":"https://github.com/0xrobiul/CVE-2021-41349"},{"source":"pocgithub","id":"exploit-io/CVE-2021-41349","title":"exploit-io/CVE-2021-41349","date":"2022-01-06","url":"https://github.com/exploit-io/CVE-2021-41349"}],"products":[{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2013 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 21"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 22"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 10"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 11"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41349","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41349","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41349"},{"url":"https://github.com/advisories/GHSA-xjg9-924r-39mj"}],"sources":{"cve":[{"id":"CVE-2021-41349","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Microsoft Exchange Server Spoofing Vulnerability","status":"published","published":"2021-11-10T00:46:32Z","modified":"2026-08-19T16:27:14.424Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-28378","description":"Microsoft Exchange Server Spoofing Vulnerability","status":"published","published":"2021-11-10T00:46:32Z","modified":"2026-08-19T16:27:14Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:01:43.218519Z"}],"ghsa":[{"id":"GHSA-xjg9-924r-39mj","title":"Microsoft Exchange Server Spoofing Vulnerability This CVE ID is unique from CVE-2021-42305.","description":"Microsoft Exchange Server Spoofing Vulnerability This CVE ID is unique from CVE-2021-42305.","status":"published","published":"2022-05-24T19:20:25Z","modified":"2026-08-19T18:31:37Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:10:40.42434Z"}],"nvd":[{"id":"CVE-2021-41349","description":"Microsoft Exchange Server Spoofing Vulnerability","status":"published","published":"2021-11-10T01:19:28.653Z","modified":"2026-08-19T17:17:54.71Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:00.984108Z"}]}}