{"cve":{"cve_id":"CVE-2021-26084","is_kev":true,"kev_date_added":"2021-11-03","kev_vendor_project":"Atlassian","kev_product":"Confluence Server and Data Center","kev_vulnerability_name":"Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability","kev_short_description":"Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2021-11-17","kev_known_ransomware":true,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-26084","kev_cwes":["CWE-917"],"epss_score":0.99999,"epss_percentile":0.99992,"epss_as_of":"2026-06-23","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.","published_at":"2021-08-30T06:30:14.248000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-917"],"nvd_references":["https://jira.atlassian.com/browse/CONFSERVER-67940","http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html"],"vuln_status":null,"trending_score":0.6099982,"is_trending":true,"has_trended":true,"trended_number_one":false,"trending_peak_score":0.6099982,"trending_peak_rank":45,"started_trending_at":"2026-06-29T02:30:27.366045Z","trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T02:30:27.550645Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","poc","trending","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack 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Center","version_start":"unspecified","version_start_inclusive":true,"version_end":"7.4.11","version_end_inclusive":false,"cpe23_uri":"cve5:atlassian:confluence-data-center:unspecified:7.4.11"},{"vendor_slug":"atlassian","vendor_name":"Atlassian","product_slug":"confluence-data-center","product_name":"Confluence Data Center","version_start":"7.5.0","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":false,"cpe23_uri":"cve5:atlassian:confluence-data-center:7.5.0:unspecified"},{"vendor_slug":"atlassian","vendor_name":"Atlassian","product_slug":"confluence-data-center","product_name":"Confluence Data Center","version_start":"unspecified","version_start_inclusive":true,"version_end":"7.11.6","version_end_inclusive":false,"cpe23_uri":"cve5:atlassian:confluence-data-center:unspecified:7.11.6"},{"vendor_slug":"atlassian","vendor_name":"Atlassian","product_slug":"confluence-data-center","product_name":"Confluence Data 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revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"started_trending","at":"2026-06-29T02:30:27.366045Z","label":"Started trending","source":null}]}