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CVE-2023-22515

critical

Description

Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unknown vulnerability in publicly accessible Confluence Data Center and Server instances to create unauthorized Confluence administrator accounts and access Confluence instances. Atlassian Cloud sites are not affected by this vulnerability. If your Confluence site is accessed via an atlassian.net domain, it is hosted by Atlassian and is not vulnerable to this issue.

References

https://www.security.com/threat-intelligence/ransomware-trends-2025

https://www.securityweek.com/citrix-cisco-fortinet-zero-days-among-2023s-most-exploited-vulnerabilities/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-317a

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-242a

https://www.greynoise.io/blog/spike-in-atlassian-exploitation-attempts-patching-is-crucial

https://thehackernews.com/2023/11/alert-effluence-backdoor-persists.html?&web_view=true

https://confluence.atlassian.com/security/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html

https://www.securityweek.com/microsoft-blames-nation-state-threat-actor-for-confluence-zero-day-attacks/

https://www.tenable.com/blog/cve-2023-22527-atlassian-confluence-data-center-and-server-template-injection-exploited-in-the

https://www.tenable.com/blog/cve-2023-22518-critical-atlassian-confluence-data-center-and-server-improper-authorization

https://www.tenable.com/blog/cve-2023-22515-zero-day-vulnerability-in-atlassian-confluence-data-center-and-server-exploited

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22515

https://jira.atlassian.com/browse/CONFSERVER-92475

https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276

https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515

http://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Published: 2023-10-04

Updated: 2025-10-24

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.94326

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest