CVE-2025-22166

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-21 · updated 2026-10-08
Weakness: CWE-405

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.

Affected products

Atlassian Confluence Data Center: from 8.5.0 before 8.5.25; from 9.2.0 before 9.2.7; from 10.0.0 before 10.0.2 — fixed in 10.0.2, 8.5.25, 9.2.7
Atlassian Confluence Data Center: from 8.5.0 before 8.5.25; from 9.2.0 before 9.2.7; from 10.0.0 before 10.0.2 — fixed in 10.0.2, 8.5.25, 9.2.7

How to fix

Upgrade to a fixed version: Atlassian Confluence Data Center 10.0.2, 8.5.25, 9.2.7; Atlassian Confluence Data Center 10.0.2, 8.5.25, 9.2.7. Check the vendor advisory for mitigations.

References

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