Atlassian Confluence Data Center and Server Template Injection Vulnerability
Atlassian — Confluence Data Center
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.
10.0
100.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Jan 16, 2024
- Modified
- Oct 21, 2025
- Added to KEV
- Jan 24, 2024
- Federal patch due
- Feb 14, 2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2023-22527, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2023-22527 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2023-22527?
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.
How severe is CVE-2023-22527?
CVE-2023-22527 has a CVSS base score of 10.0 out of 10 (CVSS 3.0).
Is CVE-2023-22527 actively exploited in the wild?
Yes. CVE-2023-22527 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jan 24, 2024, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2023-22527?
100.0% - meaning FIRST.org's EPSS model estimates a 100.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2023-22527?
Yes - a public Nuclei template referencing CVE-2023-22527 exist in public repositories we checked.
What type of vulnerability is CVE-2023-22527?
CVE-2023-22527 is classified under CWE-74 (CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2023-22527 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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