{"id":"CVE-2025-22166","state":"PUBLISHED","title":"This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center.\r","description":"This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center.\r\n\r\nThis DoS (Denial of Service) vulnerability, with a CVSS Score of 8.3, allows an attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network.\r\n\r\nAtlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\r\n Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.25\r\n Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.7\r\n Confluence Data Center and Server 10.0: Upgrade to a release greater than or equal to 10.0.2\r\n\r\nSee the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).\r\n\r\nThis vulnerability was reported via our Atlassian (Internal) program.","publishedAt":"2025-10-21T16:00:05.978Z","updatedAt":"2025-10-21T16:21:27.828Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","source":"atlassian"},"assigner":"atlassian","products":["Atlassian Confluence Data Center"],"affected":[{"vendor":"Atlassian","product":"Confluence Data Center","versions":[{"version":"9.5.1 to 9.5.4","status":"affected"},{"version":"9.4.0 to 9.4.1","status":"affected"},{"version":"9.3.1 to 9.3.2","status":"affected"},{"version":"9.2.0 to 9.2.6","status":"affected"},{"version":"9.1.0 to 9.1.1","status":"affected"},{"version":"9.0.1 to 9.0.3","status":"affected"},{"version":"8.9.0 to 8.9.8","status":"affected"},{"version":"8.8.0 to 8.8.1","status":"affected"},{"version":"8.7.1 to 8.7.2","status":"affected"},{"version":"8.6.1 to 8.6.2","status":"affected"},{"version":"8.5.3 to 8.5.24","status":"affected"},{"version":"7.19.16 to 7.19.30","status":"affected"},{"version":"10.0.2 to 10.0.3","status":"unaffected"},{"version":"9.2.7 to 9.2.9","status":"unaffected"},{"version":"8.5.25 to 8.5.27","status":"unaffected"}]}],"references":["https://confluence.atlassian.com/pages/viewpage.action?pageId=1652920034","https://jira.atlassian.com/browse/CONFSERVER-100907"],"weaknesses":["CWE-405"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/22xxx/CVE-2025-22166.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-22166","state":"PUBLISHED","datePublished":"2025-10-21T16:00:05.978Z","dateUpdated":"2025-10-21T16:21:27.828Z","assignerShortName":"atlassian","assignerOrgId":"f08a6ab8-ed46-4c22-8884-d911ccfe3c66","dateReserved":"2025-01-01T00:01:27.176Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center.\r\n\r\nThis DoS (Denial of Service) vulnerability, with a CVSS Score of 8.3, allows an attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network.\r\n\r\nAtlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\r\n Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.25\r\n Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.7\r\n Confluence Data Center and Server 10.0: Upgrade to a release greater than or equal to 10.0.2\r\n\r\nSee the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).\r\n\r\nThis vulnerability was reported via our Atlassian (Internal) program."}],"affected":[{"vendor":"Atlassian","product":"Confluence Data Center","versions":[{"version":"9.5.1 to 9.5.4","status":"affected"},{"version":"9.4.0 to 9.4.1","status":"affected"},{"version":"9.3.1 to 9.3.2","status":"affected"},{"version":"9.2.0 to 9.2.6","status":"affected"},{"version":"9.1.0 to 9.1.1","status":"affected"},{"version":"9.0.1 to 9.0.3","status":"affected"},{"version":"8.9.0 to 8.9.8","status":"affected"},{"version":"8.8.0 to 8.8.1","status":"affected"},{"version":"8.7.1 to 8.7.2","status":"affected"},{"version":"8.6.1 to 8.6.2","status":"affected"},{"version":"8.5.3 to 8.5.24","status":"affected"},{"version":"7.19.16 to 7.19.30","status":"affected"},{"version":"10.0.2 to 10.0.3","status":"unaffected"},{"version":"9.2.7 to 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ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-21T16:21:21.142041Z","id":"CVE-2025-22166","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-405","type":"CWE","lang":"en","description":"CWE-405 Asymmetric Resource Consumption (Amplification)"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-21T16:21:27.828Z"}}]}}}