---
id: "CVE-2023-22527"
kind: "vulnerability"
aliases: ["CVE-2023-22527"]
title: "A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated\u2026"
severity: "critical"
cvss: 10.0
epss: null
exploited: true
status: "open"
category: "package"
products: [{"name": "Atlassian Confluence Data Center and Server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "atlassian confluence data center", "fixed": ["8.5.4"], "affected": ">= 8.0.0, < 8.5.4", "ecosystem": "vendor"}, {"name": "atlassian confluence data center", "fixed": [], "affected": "= 8.7.0", "ecosystem": "vendor"}, {"name": "atlassian confluence server", "fixed": ["8.5.4"], "affected": ">= 8.0.0, < 8.5.4", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["atlassian", "confluence", "exploited", "package", "ransomware", "self-hosted"]
not_affected_if: ["atlassian-cloud"]
published_at: "2024-01-16T05:15:08+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-22527", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22527", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# A template injection vulnerability on older versions of Confluence Data Center and Server allows an unauthenticated…

Atlassian Confluence Data Center and Server has an unauthenticated OGNL template injection flaw. An attacker can send a crafted request and run code on the server.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Atlassian Confluence Data Center and Server affected ? fixed ?
- vendor:atlassian confluence data center affected >= 8.0.0, < 8.5.4 fixed 8.5.4
- vendor:atlassian confluence data center affected = 8.7.0 fixed ?
- vendor:atlassian confluence server affected >= 8.0.0, < 8.5.4 fixed 8.5.4

## Fix

Apply the mitigations per Atlassian's vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-22527
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-22527

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_