{"cve_id":"CVE-2021-26084","published":"2021-08-30T07:15:06.587000+00:00","last_modified":"2026-06-17T03:42:49.750000+00:00","vuln_status":"Analyzed","description":"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.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-917"],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":true,"epss_score":0.99999,"epss_percentile":0.99993,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:47:10.756498+00:00","first_seen":"2021-08-30T07:15:06.587000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["atlassian"],"products":["confluence_data_center","confluence_server"],"affected":[{"vendor":"atlassian","product":"confluence_data_center","ranges":["< 6.13.23","≥ 6.14.0 and < 7.4.11","≥ 7.5.0 and < 7.11.6","≥ 7.12.0 and < 7.12.5"]},{"vendor":"atlassian","product":"confluence_server","ranges":["< 6.13.23","≥ 6.14.0 and < 7.4.11","≥ 7.5.0 and < 7.11.6","≥ 7.12.0 and < 7.12.5"]}]}