{"containers":{"cna":{"affected":[{"product":"Confluence Server","vendor":"Atlassian","versions":[{"lessThan":"6.13.23","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"6.14.0","versionType":"custom"},{"lessThan":"7.4.11","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"7.5.0","versionType":"custom"},{"lessThan":"7.11.6","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"7.12.0","versionType":"custom"},{"lessThan":"7.12.5","status":"affected","version":"unspecified","versionType":"custom"}]},{"product":"Confluence Data Center","vendor":"Atlassian","versions":[{"lessThan":"6.13.23","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"6.14.0","versionType":"custom"},{"lessThan":"7.4.11","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"7.5.0","versionType":"custom"},{"lessThan":"7.11.6","status":"affected","version":"unspecified","versionType":"custom"},{"lessThan":"unspecified","status":"affected","version":"7.12.0","versionType":"custom"},{"lessThan":"7.12.5","status":"affected","version":"unspecified","versionType":"custom"}]}],"datePublic":"2021-08-10T00:00:00.000Z","descriptions":[{"lang":"en","value":"In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5."}],"problemTypes":[{"descriptions":[{"description":"Remote Code Execution","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2022-06-08T17:06:12.000Z","orgId":"f08a6ab8-ed46-4c22-8884-d911ccfe3c66","shortName":"atlassian"},"references":[{"tags":["x_refsource_MISC"],"url":"https://jira.atlassian.com/browse/CONFSERVER-67940"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@atlassian.com","DATE_PUBLIC":"2021-08-10T00:00:00","ID":"CVE-2021-26084","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Confluence Server","version":{"version_data":[{"version_affected":"<","version_value":"6.13.23"},{"version_affected":">=","version_value":"6.14.0"},{"version_affected":"<","version_value":"7.4.11"},{"version_affected":">=","version_value":"7.5.0"},{"version_affected":"<","version_value":"7.11.6"},{"version_affected":">=","version_value":"7.12.0"},{"version_affected":"<","version_value":"7.12.5"}]}},{"product_name":"Confluence Data Center","version":{"version_data":[{"version_affected":"<","version_value":"6.13.23"},{"version_affected":">=","version_value":"6.14.0"},{"version_affected":"<","version_value":"7.4.11"},{"version_affected":">=","version_value":"7.5.0"},{"version_affected":"<","version_value":"7.11.6"},{"version_affected":">=","version_value":"7.12.0"},{"version_affected":"<","version_value":"7.12.5"}]}}]},"vendor_name":"Atlassian"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Remote Code Execution"}]}]},"references":{"reference_data":[{"name":"https://jira.atlassian.com/browse/CONFSERVER-67940","refsource":"MISC","url":"https://jira.atlassian.com/browse/CONFSERVER-67940"},{"name":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html"}]}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T20:19:19.592Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://jira.atlassian.com/browse/CONFSERVER-67940"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html"}]},{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-917","lang":"en","description":"CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')"}]}],"references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084","tags":["government-resource"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-12-16T18:01:22.351686Z","id":"CVE-2021-26084","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}},{"other":{"type":"kev","content":{"dateAdded":"2021-11-03","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-12-16T18:04:05.834Z"}}]},"cveMetadata":{"assignerOrgId":"f08a6ab8-ed46-4c22-8884-d911ccfe3c66","assignerShortName":"atlassian","cveId":"CVE-2021-26084","datePublished":"2021-08-30T06:30:14.248Z","dateReserved":"2021-01-25T00:00:00.000Z","dateUpdated":"2025-12-16T18:04:05.834Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}