CVE-2026-21569 json
This High severity XXE (XML External Entity Injection) vulnerability was introduced in version 7.1.0 of Crowd Data Center and Server.
published 2026-01-28 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-4913
- cvss
- 7.9
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Atlassian Crowd Data Center 7.1.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.9 | CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H |
Affected products
- Atlassian Crowd Data Center
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
confluence.atlassian.com
/pages/viewpage.action?pageId=1712324819
vendor-advisory
-
jira.atlassian.com
/browse/CWD-6453
issue-tracking, vendor-advisory
Sources
- CVE List CVE-2026-21569
- NVD CVE-2026-21569
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.