---
title: "CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-22527/
description: "CVE-2023-22527 (Atlassian Confluence Data Center and Server): Exploited in the wild (CISA KEV). A template injection vulnerability on older versions of…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-01-16
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-22527"
kev: true
cvss: 10
epss: 0.99984
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Atlassian Confluence Data Center and Server. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-01-24, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-02-14 ; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns .
- EPSS 100.0% , percentile 100.0: FIRST’s model estimates a 100.0% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

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 (CVE record)

- 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
- 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

## Severity

- atlassian CVSS 3.0: 10 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2024-01-24; federal due date 2024-02-14. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 99.98% probability of exploitation activity in the next 30 days; percentile 100.0.

## Sources

- [Listed in CISA KEV notes (confluence.atlassian.com)](https://confluence.atlassian.com/security/cve-2023-22527-rce-remote-code-execution-vulnerability-in-confluence-data-center-and-confluence-server-1333990257.html)
- [CVE.org record CVE-2023-22527](https://www.cve.org/CVERecord?id=CVE-2023-22527)
- [NVD entry CVE-2023-22527](https://nvd.nist.gov/vuln/detail/CVE-2023-22527)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-22527)
- [confluence.atlassian.com](https://confluence.atlassian.com/pages/viewpage.action?pageId=1333335615)
- [jira.atlassian.com](https://jira.atlassian.com/browse/CONFSERVER-93833)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/176789/Atlassian-Confluence-SSTI-Injection.html)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/pwning-confluence-via-ognl-injection-for-fun-and-learning-cve-2023-22527)

---
Source page: https://erroneo.us/security/cve/CVE-2023-22527/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt