CVE-2025-22166 Denial of service in Confluence Data Center
An attacker can disrupt Confluence Data Center services, causing denial of service for intended users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-22166?
CVE-2025-22166 is a high-severity denial of service vulnerability in Atlassian Confluence Data Center, published on 21 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-405
Which versions are affected by CVE-2025-22166?
It affects 2 products.
Products include Atlassian Confluence Data Center, Atlassian Confluence Server.
How do I fix CVE-2025-22166?
No fix has been published for CVE-2025-22166 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-22166 being exploited?
There is no known exploitation of CVE-2025-22166 in the wild and no public exploit code.
Other vulnerabilities in Atlassian Confluence Data Center
- CVE-2023-22527 Atlassian Confluence Data Center and Server Template Injection
- CVE-2023-22518 Atlassian Confluence Data Center and Server Improper Authorization
- CVE-2023-22515 Atlassian Confluence Data Center and Server Broken Access Control
- CVE-2022-26134 Atlassian Confluence Server and Data Center Remote Code Execution
- CVE-2021-26084 Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection
Sources
Also known as GHSA-879m-mhmf-vg5r.