Advisory Published


First published: Tue Nov 21 2023(Updated: )

This High severity RCE (Remote Code Execution) vulnerability was introduced in version 3.4.6 of Crowd Data Center and Server. This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 8.0, allows an authenticated attacker to execute arbitrary code which has high impact to confidentiality, high 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 3.4: Upgrade to a release greater than or equal to 5.1.6 Crowd Data Center and Server 5.2: Upgrade to a release greater than or equal to 5.2.1 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 discovered by m1sn0w and reported via our Bug Bounty program

Credit: security@atlassian.com

Affected SoftwareAffected VersionHow to fix
Atlassian Crowd>=3.4.0<5.1.6
Atlassian Crowd=5.2.0

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Frequently Asked Questions

  • What is CVE-2023-22521?

    CVE-2023-22521 is a high severity RCE (Remote Code Execution) vulnerability in Crowd Data Center and Server.

  • How does CVE-2023-22521 affect Atlassian Crowd?

    CVE-2023-22521 affects Atlassian Crowd versions 3.4.0 to 5.1.6, as well as version 5.2.0.

  • What is the severity of CVE-2023-22521?

    CVE-2023-22521 has a severity rating of high with a CVSS score of 8.0.

  • How can an attacker exploit CVE-2023-22521?

    An authenticated attacker can exploit CVE-2023-22521 to execute arbitrary code, leading to a high impact on confidentiality.

  • Is there a fix for CVE-2023-22521?

    Yes, Atlassian has released a fix for CVE-2023-22521. Please refer to the official Atlassian website for more information on the fix.


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