CVE-2023-22515

Name: CVE-2023-22515
Creator: NVD / NIST
Published: 2023-10-04T14:15:10.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.16%

Last modified Jun 17, 2026

CVE-2023-22515 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

99.16%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Oct 13, 2023.

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Atlassian	Confluence Data Center	>= 8.0.0, < 8.3.3
Atlassian	Confluence Data Center	>= 8.4.0, < 8.4.3
Atlassian	Confluence Data Center	>= 8.5.0, < 8.5.2
Atlassian	Confluence Server	>= 8.0.0, < 8.3.3
Atlassian	Confluence Server	>= 8.4.0, < 8.4.3
Atlassian	Confluence Server	>= 8.5.0, < 8.5.2

References

http://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515Vendor Advisory
https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-92475Issue Tracking, Vendor Advisory
http://packetstormsecurity.com/files/175225/Atlassian-Confluence-Unauthenticated-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://confluence.atlassian.com/display/KB/FAQ+for+CVE-2023-22515Vendor Advisory
https://confluence.atlassian.com/pages/viewpage.action?pageId=1295682276Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-92475Issue Tracking, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22515US Government Resource

Timeline

Published: Oct 4, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-22515?

How severe is CVE-2023-22515?

CVE-2023-22515 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.16% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-22515?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-22515?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST