CVE-2023-22527

Atlassian Confluence Data Center and Server Template Injection

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 100.0%

Published16 Jan 2024
Added to CISA KEV24 Jan 2024
Remediation due14 Feb 2024

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Atlassian Confluence Data Center≥ 8.0.0 < 8.5.4 · 8.7.0

Atlassian Confluence Server≥ 8.0.0 < 8.5.4

Remediation

Fixed in

Atlassian Confluence Data Center≥ 8.5.4

Atlassian Confluence Server≥ 8.5.4

Patch & vendor advisories

References

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

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2023-22527 being actively exploited?

Yes. CVE-2023-22527 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 24 Jan 2024. It has been used in ransomware campaigns.

How severe is CVE-2023-22527?

CVE-2023-22527 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 100.0% probability of exploitation.

Which products are affected by CVE-2023-22527?

Affected products include Atlassian Confluence Data Center, Atlassian Confluence Server.

How do I fix CVE-2023-22527?

Upgrade affected software to a fixed version, for example Atlassian Confluence Data Center 8.5.4, Atlassian Confluence Server 8.5.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-22527 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.