{"api_version":"1","generated_at":"2026-07-23T13:34:26+00:00","cve":"CVE-2021-20664","urls":{"html":"https://cve.report/CVE-2021-20664","api":"https://cve.report/api/cve/CVE-2021-20664.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-20664","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-20664"},"summary":{"title":"CVE-2021-20664","description":"Cross-site scripting vulnerability in in Asset registration screen of Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors.","state":"PUBLIC","assigner":"vultures@jpcert.or.jp","published_at":"2021-03-05 10:15:00","updated_at":"2021-03-22 20:06:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://jvn.jp/en/jp/JVN66542874/index.html","name":"https://jvn.jp/en/jp/JVN66542874/index.html","refsource":"MISC","tags":[],"title":"JVN#66542874: Multiple cross-site scripting vulnerabilities in Movable Type","mime":"text/xml","httpstatus":"200","archivestatus":"0"},{"url":"https://movabletype.org/news/2021/02/mt-760-676-released.html","name":"https://movabletype.org/news/2021/02/mt-760-676-released.html","refsource":"MISC","tags":[],"title":"MovableType.org – News:                      Movable Type r.4706 (v7.6.0), v6.7.6 released","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20664","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20664","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"20664","vulnerable":"1","versionEndIncluding":"6.7.5","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"movabletype","cpe5":"movable_type","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20664","vulnerable":"1","versionEndIncluding":"7.4705","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"movabletype","cpe5":"movable_type","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20664","vulnerable":"1","versionEndIncluding":"7.4705","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"movabletype","cpe5":"movable_type_advanced","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20664","vulnerable":"1","versionEndIncluding":"1.39","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"movabletype","cpe5":"movable_type_premium","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20664","vulnerable":"1","versionEndIncluding":"1.39","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"movabletype","cpe5":"movable_type_premium_advanced","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-20664","ASSIGNER":"vultures@jpcert.or.jp","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Six Apart Ltd.","product":{"product_data":[{"product_name":"Movable Type","version":{"version_data":[{"version_value":"Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Cross-site scripting"}]}]},"references":{"reference_data":[{"url":"https://jvn.jp/en/jp/JVN66542874/index.html","refsource":"MISC","name":"https://jvn.jp/en/jp/JVN66542874/index.html"},{"url":"https://movabletype.org/news/2021/02/mt-760-676-released.html","refsource":"MISC","name":"https://movabletype.org/news/2021/02/mt-760-676-released.html"}]},"description":{"description_data":[{"lang":"eng","value":"Cross-site scripting vulnerability in in Asset registration screen of Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors."}]}},"nvd":{"publishedDate":"2021-03-05 10:15:00","lastModifiedDate":"2021-03-22 20:06:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:movabletype:movable_type:*:*:*:*:*:*:*:*","versionEndIncluding":"6.7.5","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:movabletype:movable_type:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0000","versionEndIncluding":"7.4705","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:movabletype:movable_type_premium:*:*:*:*:*:*:*:*","versionEndIncluding":"1.39","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:movabletype:movable_type_premium_advanced:*:*:*:*:*:*:*:*","versionEndIncluding":"1.39","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:movabletype:movable_type_advanced:*:*:*:*:*:*:*:*","versionEndIncluding":"7.4705","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"20664","Ordinal":"194709","Title":"CVE-2021-20664","CVE":"CVE-2021-20664","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"20664","Ordinal":"1","NoteData":"Cross-site scripting vulnerability in in Asset registration screen of Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"20664","Ordinal":"2","NoteData":"2021-03-05","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"20664","Ordinal":"3","NoteData":"2021-03-05","Type":"Other","Title":"Modified"}]}}}