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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact High

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00123.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Atlassian Confluence Data Center affected
Version Status Constraints
9.5.1 to 9.5.4 affected —
9.4.0 to 9.4.1 affected —
9.3.1 to 9.3.2 affected —
9.2.0 to 9.2.6 affected —
9.1.0 to 9.1.1 affected —
9.0.1 to 9.0.3 affected —
8.9.0 to 8.9.8 affected —
8.8.0 to 8.8.1 affected —
8.7.1 to 8.7.2 affected —
8.6.1 to 8.6.2 affected —
8.5.3 to 8.5.24 affected —
7.19.16 to 7.19.30 affected —
10.0.2 to 10.0.3 unaffected —
9.2.7 to 9.2.9 unaffected —
8.5.25 to 8.5.27 unaffected —

Configuration 1 [-]

OR cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://confluence.atlassian.com/pages/viewpage.action?pageId=1652920034 cve-icon cve-icon
https://jira.atlassian.com/browse/CONFSERVER-100907 cve-icon cve-icon
History

Fri, 05 Dec 2025 19:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Thu, 23 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Atlassian
Atlassian confluence Data Center
Atlassian confluence Server
Vendors & Products Atlassian
Atlassian confluence Data Center
Atlassian confluence Server

Tue, 21 Oct 2025 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-405
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 21 Oct 2025 16:15:00 +0000

Type Values Removed Values Added
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.
References
Metrics cvssV4_0

{'score': 8.3, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: atlassian

Published:

Updated: 2025-10-21T16:21:27.828Z

Reserved: 2025-01-01T00:01:27.176Z

Link: CVE-2025-22166

cve-icon Vulnrichment

Updated: 2025-10-21T16:20:52.235Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-21T16:15:37.370

Modified: 2025-12-05T19:22:44.947

Link: CVE-2025-22166

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-23T10:13:10Z

Weaknesses