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CVE-2026-21569

Quick assessment

Affected
Atlassian Crowd Data Center
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Atlassian Crowd Data Center是澳大利亚Atlassian公司的Crowd的集群部署版。 Atlassian Crowd Data Center 7.1.0及之后版本存在安全漏洞，该漏洞源于XML外部实体注入，可能导致访问本地和远程内容。

AI Predicted 7.9 Difficulty: Easy EPSS 0.33% · P24
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I. Basic Information for CVE-2026-21569

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This High severity XXE (XML External Entity Injection) vulnerability was introduced in version 7.1.0 of Crowd Data Center and Server. This XXE (XML External Entity Injection) vulnerability, with a CVSS Score of 7.9, allows an authenticated attacker to access local and remote content which has high impact to confidentiality, low impact to integrity, high impact to availability, and requires no user interaction. Atlassian recommends that Crowd Data Center and Server customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: * Crowd Data Center and Server 7.1: Upgrade to a release greater than or equal to 7.1.3 See the release notes (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). You can download the latest version of Crowd Data Center and Server from the download center (https://www.atlassian.com/software/crowd/download-archive). This vulnerability was reported via our Atlassian (Internal) program.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Atlassian Crowd Data Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atlassian Crowd Data Center是澳大利亚Atlassian公司的Crowd的集群部署版。 Atlassian Crowd Data Center 7.1.0及之后版本存在安全漏洞，该漏洞源于XML外部实体注入，可能导致访问本地和远程内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Crowd Data Center 7.1.0 to 7.1.2 -

II. Public POCs for CVE-2026-21569

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III. Intelligence Information for CVE-2026-21569

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Vendor Advisories for CVE-2026-21569 (1)

IV. Related Vulnerabilities

Same product: Crowd Data Center
Same vendor: Atlassian

V. Comments for CVE-2026-21569

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