{"api_version":"1","generated_at":"2026-07-23T12:51:39+00:00","cve":"CVE-2021-34817","urls":{"html":"https://cve.report/CVE-2021-34817","api":"https://cve.report/api/cve/CVE-2021-34817.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-34817","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-34817"},"summary":{"title":"CVE-2021-34817","description":"A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-07-19 14:15:00","updated_at":"2021-07-27 18:14:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://etherpad.org/#download","name":"https://etherpad.org/#download","refsource":"MISC","tags":[],"title":"Etherpad","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa","name":"https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa","refsource":"MISC","tags":[],"title":"escape userId before setting it as HTML attribute · ether/etherpad-lite@a796811 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/ether/etherpad-lite/releases/tag/1.8.14","name":"https://github.com/ether/etherpad-lite/releases/tag/1.8.14","refsource":"MISC","tags":[],"title":"Release 1.8.14 · ether/etherpad-lite · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities","name":"https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities","refsource":"MISC","tags":[],"title":"Etherpad 1.8.13 - Code Execution Vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-34817","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34817","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"34817","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"etherpad","cpe5":"etherpad","cpe6":"1.8.13","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-34817","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://etherpad.org/#download","refsource":"MISC","name":"https://etherpad.org/#download"},{"refsource":"MISC","name":"https://github.com/ether/etherpad-lite/releases/tag/1.8.14","url":"https://github.com/ether/etherpad-lite/releases/tag/1.8.14"},{"refsource":"MISC","name":"https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities","url":"https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"},{"refsource":"MISC","name":"https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa","url":"https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}]}},"nvd":{"publishedDate":"2021-07-19 14:15:00","lastModifiedDate":"2021-07-27 18:14:00","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":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:etherpad:etherpad:1.8.13:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"34817","Ordinal":"210292","Title":"CVE-2021-34817","CVE":"CVE-2021-34817","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"34817","Ordinal":"1","NoteData":"A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"34817","Ordinal":"2","NoteData":"2021-07-19","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"34817","Ordinal":"3","NoteData":"2021-07-19","Type":"Other","Title":"Modified"}]}}}