CVE-2026-21569: This High severity XXE (XML External Entity Injection) vulnerability was introduced in version 7.1.0 of Crowd Data Center and Server

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.

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H

Attack vector

Network

Complexity

High

Privileges

High

User interaction

None

Confidentiality

High

Integrity

Low

Availability

High

Scope

Changed

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 26% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

CD

Crowd Data Center · Atlassian

7.1.0 to 7.1.2 · source: vendor

CR

Crowd · Atlassian

7.1.0 before 7.1.3 · source: NVD