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CVE-2025-22166

HIGH
7.5
CVSS Score
Published: October 21, 2025 at 04:00 PM UTC
Updated: October 8, 2026 at 11:10 AM UTC
2 products affected across 1 vendorConfluence ServerConfluence Data Center

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Confluence Data Center· Atlassianatlassian-app
95%
10.0.0 ≤ v < 10.0.28.5.0 ≤ v < 8.5.259.2.0 ≤ v < 9.2.7*7.19.16 to 7.19.308.5.138.5.228.5.238.5.248.5.3 to 8.5.248.6.1 to 8.6.28.7.1 to 8.7.28.8.0 to 8.8.18.9.0 to 8.9.89.0.1 to 9.0.39.1.0 to 9.1.19.2.0 to 9.2.69.2.29.2.39.2.49.2.59.2.69.3.1 to 9.3.29.4.0 to 9.4.19.4.19.5.1 to 9.5.4
Affected range stops below 10.0.2, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 10.0.2 to 10.0.3 (unaffected)
Affected range stops below 8.5.25, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 8.5.25 to 8.5.27 (unaffected)
Affected range stops below 9.2.7, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 9.2.7 to 9.2.9 (unaffected)
Confluence Server· Atlassianatlassian-app
95%
10.0.0 ≤ v < 10.0.28.5.0 ≤ v < 8.5.259.2.0 ≤ v < 9.2.7*
Affected range stops below 10.0.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.5.25, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.2.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
https://confluence.atlassian.com/pages/viewpage.action?pageId=1652920034
Vendor Advisory
Source: [email protected]
https://jira.atlassian.com/browse/CONFSERVER-100907

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-405

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