{"id":"CVE-2021-20812","aliases":["EUVD-2021-8224","GHSA-2554-pph3-4jmx"],"status":"published","title":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type...","description":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series) and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-12","score":0.009,"percentile":0.60136,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-08-26T01:20:41Z","modified":"2026-06-17T03:34:29Z","products":[{"vendor":"six apart ltd.","product":"movable type"},{"vendor":"sixapart","product":"movable_type"}],"references":[{"url":"https://movabletype.org/news/2021/08/mt-780-681-released.html","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN97545738/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20812"},{"url":"https://github.com/advisories/GHSA-2554-pph3-4jmx"}],"sources":{"cve":[{"id":"CVE-2021-20812","description":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series) and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","status":"published","published":"2021-08-26T01:20:41Z","modified":"2024-08-03T17:53:22.692Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8224","description":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series) and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","status":"published","published":"2021-08-26T01:20:41Z","modified":"2024-08-03T17:53:22Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-2554-pph3-4jmx","title":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type...","description":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series) and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","status":"published","published":"2022-05-24T19:12:20Z","modified":"2023-01-30T05:01:46Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:28.825002Z"}],"nvd":[{"id":"CVE-2021-20812","description":"Cross-site scripting vulnerability in Setting screen of Server Sync of Movable Type (Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series) and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.","status":"published","published":"2021-08-26T02:15:11.557Z","modified":"2026-06-17T03:34:29.577Z","cvss":[{"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"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:57.67549Z"}]}}