{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T03:32:07.767","vulnerabilities":[{"cve":{"id":"CVE-2021-26084","sourceIdentifier":"security@atlassian.com","published":"2021-08-30T07:15:06.587","lastModified":"2025-10-24T13:38:44.590","vulnStatus":"Analyzed","cveTags":[],"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."},{"lang":"es","value":"En las versiones afectadas de Confluence Server y Data Center, se presenta una vulnerabilidad de inyección OGNL que permitiría a un usuario no autenticado ejecutar código arbitrario en una instancia de Confluence Server o Data Center. Las versiones afectadas son las versiones anteriores a 6.13.23, desde versiones 6.14.0 anteriores a 7.4.11, desde versiones 7.5.0 anteriores a 7.11.6 y desde versiones 7.12.0 anteriores a 7.12.5."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"cisaExploitAdd":"2021-11-03","cisaActionDue":"2021-11-17","cisaRequiredAction":"Apply updates per vendor instructions.","cisaVulnerabilityName":"Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability","weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-917"}]},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-917"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*","versionEndExcluding":"6.13.23","matchCriteriaId":"6A28735F-4827-4410-8B0B-C209ECD21DFC"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14.0","versionEndExcluding":"7.4.11","matchCriteriaId":"FA5224DF-97AB-4D8E-B66D-FC65A1333531"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*","versionStartIncluding":"7.5.0","versionEndExcluding":"7.11.6","matchCriteriaId":"E776BF66-74F1-4D8E-9099-42A4E5EEE300"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*","versionStartIncluding":"7.12.0","versionEndExcluding":"7.12.5","matchCriteriaId":"E11303D6-258F-4FAC-A868-BF506E7F5A4E"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*","versionEndExcluding":"6.13.23","matchCriteriaId":"6D1FF67F-3FB4-4C0C-8263-3D4CA00A02CD"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14.0","versionEndExcluding":"7.4.11","matchCriteriaId":"F5CCD4D0-6BC7-442A-9D4D-43841FE40F3E"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*","versionStartIncluding":"7.5.0","versionEndExcluding":"7.11.6","matchCriteriaId":"DF59072C-9911-4035-A75A-27D882988919"},{"vulnerable":true,"criteria":"cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*","versionStartIncluding":"7.12.0","versionEndExcluding":"7.12.5","matchCriteriaId":"BFEE2534-EBEF-438B-B616-ED4FFBC9246E"}]}]}],"references":[{"url":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html","source":"security@atlassian.com","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://jira.atlassian.com/browse/CONFSERVER-67940","source":"security@atlassian.com","tags":["Issue Tracking","Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://jira.atlassian.com/browse/CONFSERVER-67940","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}]}}]}