# CVE-2011-3600: OFBiz - XXE

> Live exploitation tracking for CVE-2011-3600 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2011-3600

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 7.5
- **Public exploit available:** Yes
- **Affected products:** Apache OFBiz
- **Weaknesses:** CWE-611 (Improper Restriction of XML External Entity Reference)
- **Tags:** enterprise_software

## Description

The /webtools/control/xmlrpc endpoint in OFBiz XML-RPC event handler is exposed to External Entity Injection by passing DOCTYPE declarations with executable payloads that discloses the contents of files in the filesystem. In addition, it can also be used to probe for open network ports, and figure out from returned error messages whether a file exists or not. This affects OFBiz 16.11.01 to 16.11.04.

## CrowdSec analysis

[CVE-2011-3600](https://euvd.enisa.europa.eu/vulnerability/CVE-2011-3600) is an XML External Entity (XXE) vulnerability in the /webtools/control/xmlrpc endpoint of OFBiz versions 16.11.01 to 16.11.04. This flaw allows remote attackers to exploit DOCTYPE declarations to read sensitive files from the server's filesystem, probe for open network ports, and determine the existence of files based on error messages. Attackers can leverage this vulnerability to conduct information disclosure and reconnaissance attacks against affected OFBiz installations.

CrowdSec has been tracking this vulnerability and its exploits since 14th of January 2026.

CrowdSec network data shows that most actors exploiting CVE-2011-3600 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
CrowdSec network telemetry also shows that exploitation of CVE-2011-3600 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Attackers exploit the `/webtools/control/xmlrpc` endpoint by sending crafted XML payloads containing external entity references, enabling disclosure of sensitive files and probing of internal resources via XML External Entity (XXE) injection.

## Timeline

- 2019-11-26: CVE Published. CVE-2011-3600 is published to NVD.
- 2026-01-14: Rule Released. CrowdSec releases a rule to detect CVE-2011-3600 exploitation attempts against the CrowdSec Network.
- 2026-01-19: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2011-3600 for the first time.

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3600
- https://access.redhat.com/security/cve/cve-2011-3600
- https://security-tracker.debian.org/tracker/CVE-2011-3600
- http://mail-archives.apache.org/mod_mbox/ofbiz-user/201810.mbox/%3Cfad45546-af86-0293-9ea7-014553474b30%40apache.org%3E
- https://lists.apache.org/thread.html/7793319ae80ec350f7b82a8763460944f120ebe447f14a12155d0550%40%3Ccommits.ofbiz.apache.org%3E
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2011/CVE-2011-3600.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2011-3600) follows observed exploitation activity for CVE-2011-3600. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.