Vulnerability · Published Jan 28, 2026 · Assigned by atlassian
CVE-2026-21569
High 7.9
In plain English
A high-severity XML external entity in Crowd Data Center from Atlassian. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Atlassian | Crowd Data Center | 7.1.0 to 7.1.2 |
Weakness: CWE-611 · Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H