{"api_version":"1","generated_at":"2026-07-23T20:18:47+00:00","cve":"CVE-2021-20876","urls":{"html":"https://cve.report/CVE-2021-20876","api":"https://cve.report/api/cve/CVE-2021-20876.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-20876","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-20876"},"summary":{"title":"CVE-2021-20876","description":"Path traversal vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows an attacker with an administrative privilege to obtain sensitive information stored in the hierarchy above the directory on the published site's server via unspecified vectors.","state":"PUBLIC","assigner":"vultures@jpcert.or.jp","published_at":"2021-12-24 07:15:00","updated_at":"2022-01-10 13:21:00"},"problem_types":["CWE-22"],"metrics":[],"references":[{"url":"https://groupsession.jp/info/info-news/security20211220","name":"https://groupsession.jp/info/info-news/security20211220","refsource":"MISC","tags":[],"title":"GroupSessionは組織を強化するグループウェア\n    無料版、エンタープライズ版、クラウド型をラインナップ！","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://jvn.jp/en/jp/JVN79798166/index.html","name":"https://jvn.jp/en/jp/JVN79798166/index.html","refsource":"MISC","tags":[],"title":"JVN#79798166: Multiple vulnerabilities in GroupSession","mime":"text/xml","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20876","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20876","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"20876","vulnerable":"1","versionEndIncluding":"5.1.1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"groupsession","cpe5":"groupsession","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"cloud","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20876","vulnerable":"1","versionEndIncluding":"5.1.1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"groupsession","cpe5":"groupsession","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"free","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"20876","vulnerable":"1","versionEndIncluding":"5.1.1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"groupsession","cpe5":"groupsession","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"zion","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-2021-20876","ASSIGNER":"vultures@jpcert.or.jp","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Japan Total System Co.,Ltd.","product":{"product_data":[{"product_name":"GroupSession Free edition, GroupSession byCloud, GroupSession ZION","version":{"version_data":[{"version_value":"GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Path Traversal"}]}]},"references":{"reference_data":[{"url":"https://groupsession.jp/info/info-news/security20211220","refsource":"MISC","name":"https://groupsession.jp/info/info-news/security20211220"},{"url":"https://jvn.jp/en/jp/JVN79798166/index.html","refsource":"MISC","name":"https://jvn.jp/en/jp/JVN79798166/index.html"}]},"description":{"description_data":[{"lang":"eng","value":"Path traversal vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows an attacker with an administrative privilege to obtain sensitive information stored in the hierarchy above the directory on the published site's server via unspecified vectors."}]}},"nvd":{"publishedDate":"2021-12-24 07:15:00","lastModifiedDate":"2022-01-10 13:21:00","problem_types":["CWE-22"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.3,"impactScore":4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4},"severity":"MEDIUM","exploitabilityScore":8,"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:groupsession:groupsession:*:*:*:*:zion:*:*:*","versionEndIncluding":"5.1.1","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:groupsession:groupsession:*:*:*:*:cloud:*:*:*","versionEndIncluding":"5.1.1","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*","versionEndIncluding":"5.1.1","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"20876","Ordinal":"194921","Title":"CVE-2021-20876","CVE":"CVE-2021-20876","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"20876","Ordinal":"1","NoteData":"Path traversal vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows an attacker with an administrative privilege to obtain sensitive information stored in the hierarchy above the directory on the published site's server via unspecified vectors.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"20876","Ordinal":"2","NoteData":"2021-12-24","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"20876","Ordinal":"3","NoteData":"2021-12-24","Type":"Other","Title":"Modified"}]}}}