{"cveID":"CVE-2021-26085","vendorProject":"Atlassian","product":"Confluence Server","vulnerabilityName":"Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability","dateAdded":"2022-03-28","shortDescription":"Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a pre-authorization arbitrary file read vulnerability in the /s/ endpoint.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2022-04-18","knownRansomwareCampaignUse":"Known","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-26085","cwes":["CWE-425"],"year":2021,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2021-26085","technique":"T1190","technique_name_at_mapping":"Exploit Public-Facing Application","mapping_type":"exploitation_technique","capability_group":"access_ctrl","comments":"This vulnerability allows viewing of restricted resources via a pre-authorization arbitrary file read vulnerability.","references":["https://www.exploit-db.com/exploits/50377"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2021-26085","technique":"T1005","technique_name_at_mapping":"Data from Local System","mapping_type":"primary_impact","capability_group":"access_ctrl","comments":"This vulnerability allows viewing of restricted resources via a pre-authorization arbitrary file read vulnerability.","references":["https://www.exploit-db.com/exploits/50377"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1005","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Data from Local System","name_at_mapping":"Data from Local System","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":14,"has_detection_strategy":true},{"id":"T1190","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploit Public-Facing Application","name_at_mapping":"Exploit Public-Facing Application","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":149,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}