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CVE-2023-22518

9.8
CRITICALCVSS v3.1 Base Score
94.38%
HIGH RiskEPSS (100th percentile)
KEV

All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. This Improper Authorization vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account. Using this account, an attacker can then perform all administrative actions that are available to Confluence instance administrator leading to - but not limited to - full loss of confidentiality, integrity and availability.  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.

Published: 10/31/2023
Modified: 10/24/2025
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Atlassian Confluence Data Center and Server Improper Authorization Vulnerability

Vendor / Product:

Atlassian Confluence Data Center and Server

Required Action:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Due Date: 11/28/2023(OVERDUE)
Ransomware Campaign Use
Added to KEV:

11/7/2023

Notes:

https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html; https://nvd.nist.gov/vuln/detail/CVE-2023-22518

Vulnerability Summary

CVSS v3 Score

9.8CRITICAL

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

EPSS Score (Exploitation Probability)

94.38%HIGH Exploitation Risk
100th percentile

This vulnerability has a 94.38% probability of being exploited in the next 30 days, ranking higher than 100% of all scored CVEs.

CWE Classification

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