CVE-2023-22527

Name: CVE-2023-22527
Creator: NVD / NIST
Published: 2024-01-16T05:15:08.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.98%

Last modified Jun 17, 2026

CVE-2023-22527 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.98% chance of exploitation in the next 30 days.

Description

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE on an affected instance. Customers using an affected version must take immediate action. Most recent supported versions of Confluence Data Center and Server are not affected by this vulnerability as it was ultimately mitigated during regular version updates. However, Atlassian recommends that customers take care to install the latest version to protect their instances from non-critical vulnerabilities outlined in Atlassian’s January Security Bulletin.

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

99.98%

100.0th 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 Feb 14, 2024.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Atlassian	Confluence Data Center	>= 8.0.0, < 8.5.4
Atlassian	Confluence Data Center	8.7.0
Atlassian	Confluence Server	>= 8.0.0, < 8.5.4

References

http://packetstormsecurity.com/files/176789/Atlassian-Confluence-SSTI-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://confluence.atlassian.com/pages/viewpage.action?pageId=1333335615Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-93833Issue Tracking, Vendor Advisory
http://packetstormsecurity.com/files/176789/Atlassian-Confluence-SSTI-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://confluence.atlassian.com/pages/viewpage.action?pageId=1333335615Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-93833Issue Tracking, Vendor Advisory
https://www.vicarius.io/vsociety/posts/pwning-confluence-via-ognl-injection-for-fun-and-learning-cve-2023-22527Exploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22527US Government Resource

Timeline

Published: Jan 16, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-22527?

How severe is CVE-2023-22527?

CVE-2023-22527 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.98% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-22527?

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-2023-22527?

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

Scan your code now

Source: NVD / NIST