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Critical · 10.0 Known exploited · Ransomware Scanner template Public exploit CVE-2023-22527 EUVD-2023-26667GHSA-w64x-j9r3-q79q

A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated attacker to achieve RCE…

Published Jan 16, 2024 · Updated Oct 21, 2025 · Assigned by atlassian

Vendor: Atlassian Product: Confluence Data Center Product: Confluence Server Category: Web / CMS

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.

Affected products

VendorProductAffectedFixed
Atlassian Confluence Data Center >= 8.0.0, >= 8.1.0, >= 8.2.0, >= 8.3.0, >= 8.4.0, >= 8.5.0, >= 8.5.1, >= 8.5.2, >= 8.5.3 < 8.0.0
Atlassian Confluence Server >= 8.0.0, >= 8.1.0, >= 8.2.0, >= 8.3.0, >= 8.4.0, >= 8.5.0, >= 8.5.1, >= 8.5.2, >= 8.5.3 < 8.0.0

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 23 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 3

References