CVE-2025-22166

High

Description

This High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center. This 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. Atlassian 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: Confluence Data Center and Server 8.5: Upgrade to a release greater than or equal to 8.5.25 Confluence Data Center and Server 9.2: Upgrade to a release greater than or equal to 9.2.7 Confluence Data Center and Server 10.0: Upgrade to a release greater than or equal to 10.0.2 See 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]). This vulnerability was reported via our Atlassian (Internal) program.

SeverityHigh
CVSS7.5
Exploit probability—
ProductAtlassian Confluence Data Center
PublishedOct 21, 2025
First seenOct 21, 2025
Weakness typeCWE-405CWE-405

How to fix

Update
  • atlassian confluence_data_center8.5.25, 9.2.7, 10.0.2 or later
  • atlassian confluence_server8.5.25, 9.2.7, 10.0.2 or later

Affected products

ProductAffected versionsFixed in
atlassian confluence_data_center8.5.0 ≤ v < 8.5.25, 9.2.0 ≤ v < 9.2.7, 10.0.0 ≤ v < 10.0.28.5.25, 9.2.7, 10.0.2
atlassian confluence_server8.5.0 ≤ v < 8.5.25, 9.2.0 ≤ v < 9.2.7, 10.0.0 ≤ v < 10.0.28.5.25, 9.2.7, 10.0.2

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