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Critical · 10.0 Known exploited · Ransomware Scanner template Public exploit CVE-2023-22515 EUVD-2023-26655GHSA-g458-xvmc-qg2r

Atlassian has been made aware of an issue reported by a handful of customers where external attackers may have exploited a previously unkno…

Published Oct 4, 2023 · Updated Mar 25, 2026 · Assigned by atlassian

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

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.

Affected products

VendorProductAffectedFixed
Atlassian Confluence Data Center >= 8.0.0, >= 8.0.1, >= 8.0.2, >= 8.0.3, >= 8.1.3, >= 8.1.4, >= 8.2.0, >= 8.2.1, >= 8.2.2, >= 8.2.3, >= 8.3.0, >= 8.3.1, >= 8.3.2, >= 8.4.0, >= 8.4.1, >= 8.4.2, >= 8.5.0, >= 8.5.1 < 8.0.0
Atlassian Confluence Server >= 8.0.0, >= 8.0.1, >= 8.0.2, >= 8.0.3, >= 8.1.3, >= 8.1.4, >= 8.2.0, >= 8.2.1, >= 8.2.2, >= 8.2.3, >= 8.3.0, >= 8.3.1, >= 8.3.2, >= 8.4.0, >= 8.4.1, >= 8.4.2, >= 8.5.0, >= 8.5.1 < 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 2 modules

GitHub 31 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 2

References