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CVE-2023-22515

CRITICAL9.8
CISA KEV

Published 2023-10-04 · Updated 2026-06-17 · Source security@atlassian.com

Summary

CVE-2023-22515 is a critical-severity (CVSS 9.8) vulnerability in Atlassian Confluence Data Center and Server. CISA added it to the Known Exploited Vulnerabilities catalog on October 5, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by October 13, 2023. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Atlassian has 14 vulnerabilities in the KEV catalog, 8 of them linked to ransomware.

All 14 known-exploited Atlassian vulnerabilities →

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.

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

CWE-20

CISA Known-Exploited Vulnerability

Product: Atlassian — Confluence Data Center and Server

Name: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability

Date added: 2023-10-05 · Due: 2023-10-13

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check all affected Confluence instances for evidence of compromise per vendor instructions and report any positive findings to CISA.

References

View on NVD