CVE-2021-39239: XML External Entity (XXE) vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-16 · updated 2026-06-17
Weakness: CWE-611

Description

A vulnerability in XML processing in Apache Jena, in versions up to 4.1.0, may allow an attacker to execute XML External Entities (XXE), including exposing the contents of local files to a remote server.

Affected products

Apache Software Foundation Apache Jena: through 4.1.0

References

https://lists.apache.org/thread.html/r0f03ae7e102c3e8587fdd36531fc167309335738156dfbd7d9c1bf45%40%3Cdev.jena.apache.org%3E
https://lists.apache.org/thread.html/rce5241b228a1f0e5880f6b2bfdb7ae9ee420e94cb692738a0bbfed9d%40%3Cdev.jena.apache.org%3E
https://lists.apache.org/thread.html/rf44d529c54ef1d0097e813f576a0823a727e1669a9f610d3221d493d%40%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/rf44d529c54ef1d0097e813f576a0823a727e1669a9f610d3221d493d%40%3Cusers.jena.apache.org%3E
https://lists.apache.org/thread.html/r0f03ae7e102c3e8587fdd36531fc167309335738156dfbd7d9c1bf45%40%3Cdev.jena.apache.org%3E
https://lists.apache.org/thread.html/rce5241b228a1f0e5880f6b2bfdb7ae9ee420e94cb692738a0bbfed9d%40%3Cdev.jena.apache.org%3E
https://lists.apache.org/thread.html/rf44d529c54ef1d0097e813f576a0823a727e1669a9f610d3221d493d%40%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/rf44d529c54ef1d0097e813f576a0823a727e1669a9f610d3221d493d%40%3Cusers.jena.apache.org%3E

Get alerted when CVE-2021-39239 or the next vulnerability affects your stack