CVE-2025-22166Network attack vector

Authenticated network service interruption

Published Oct 21, 2025 · Updated Oct 21, 2025

Denial of service in Atlassian Confluence Data Center allows remote authenticated users to interrupt the service over the network. The flaw resides in an unnamed third-party dependency, and Atlassian has not disclosed the component, input, or resource-consuming operation. Network access and a low-privileged account are required; exploitation can exhaust resources and disrupt the vulnerable system and downstream services.

CVSS severity8.3
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Atlassian Confluence Data Center allows remote authenticated users to interrupt the service over the network. The flaw resides in an unnamed third-party dependency, and Atlassian has not disclosed the component, input, or resource-consuming operation. Network access and a low-privileged account are required; exploitation can exhaust resources and disrupt the vulnerable system and downstream services.

The record

CVE
CVE-2025-22166
Published
Oct 21, 2025
Updated
Oct 21, 2025
Vendor
Atlassian
Product
Confluence Data Center
Classifications
CWE-405, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.19.16 to 7.19.30
  2. Affected versionversion=8.5.3 to 8.5.24
  3. Affected versionversion=8.6.1 to 8.6.2
  4. Affected versionversion=8.7.1 to 8.7.2
  5. Affected versionversion=8.8.0 to 8.8.1
  6. Affected versionversion=8.9.0 to 8.9.8
  7. Affected versionversion=9.0.1 to 9.0.3
  8. Affected versionversion=9.1.0 to 9.1.1
  9. Affected versionversion=9.2.0 to 9.2.6
  10. Affected versionversion=9.3.1 to 9.3.2
  11. Affected versionversion=9.4.0 to 9.4.1
  12. Affected versionversion=9.5.1 to 9.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Confluence Data Centerversion=7.19.16 to 7.19.30; version=8.5.3 to 8.5.24; version=8.6.1 to 8.6.2; version=8.7.1 to 8.7.2; version=8.8.0 to 8.8.1; version=8.9.0 to 8.9.8; version=9.0.1 to 9.0.3; version=9.1.0 to 9.1.1; version=9.2.0 to 9.2.6; version=9.3.1 to 9.3.2; version=9.4.0 to 9.4.1; version=9.5.1 to 9.5.4

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.3AtlassianCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-405Asymmetric Resource Consumption (Amplification)
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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