CVE-2025-22166 Details
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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2025-22166
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.05 Probability of exploitation activity being observed over the next 30 days (14th percentile)
CVSS score for CVE-2025-22166
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2025-22166
Confluence Server 8.5.1
Confluence Server 8.5.2
Confluence Server 8.5.3
Confluence Server 8.5.4
Confluence Server 8.5.5
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2025-22166 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 17 18.09%
RU 15 15.96%
CN 10 10.64%
DE 8 8.51%
FR 6 6.38%
IR 4 4.26%
HK 3 3.19%
NL 3 3.19%
FI 3 3.19%
AU 3 3.19%

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CVE-2025-22166 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 64 92.75%
Telecommunications 5 7.25%

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