CVE-2025-11439 is a security vulnerability identified in the JhumanJ OpnForm product, affecting versions 1.9.0 through 1.9.3. The issue arises from missing authorization checks in the processing of requests to the /show/integrations endpoint. This flaw allows remote attackers to perform unauthorized actions by manipulating requests to this endpoint without requiring user interaction or elevated privileges, though low privileges are necessary. The vulnerability primarily impacts confidentiality, as unauthorized access to integration data or configurations could occur. The CVSS 4.0 base score is 5.3 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required beyond low-level access, and no user interaction needed. No known exploits are currently active in the wild, but a public exploit has been disclosed, increasing the urgency for remediation. The vendor has released a patch identified by commit 11d97d78f2de2cb49f79baed6bde8b611ec1f384 to address this issue. Organizations using OpnForm should review their deployments, apply the patch, and verify authorization controls on the affected endpoint to prevent unauthorized access or data leakage.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality, as unauthorized actors could access sensitive integration data or configurations via the /show/integrations endpoint. While the vulnerability does not directly impact system integrity or availability, unauthorized access could facilitate further attacks or data exfiltration. Organizations in sectors such as finance, healthcare, and government that rely on JhumanJ OpnForm for form processing or integrations may face increased risk of data breaches or compliance violations under GDPR. The ease of remote exploitation without user interaction or high privileges increases the threat landscape, especially for organizations with exposed OpnForm instances. Failure to patch could lead to unauthorized data access, reputational damage, and potential regulatory penalties. However, the absence of known active exploits currently reduces immediate risk, though the public exploit disclosure necessitates prompt action.

European organizations should immediately identify all instances of JhumanJ OpnForm running versions 1.9.0 through 1.9.3 and apply the vendor-provided patch (commit 11d97d78f2de2cb49f79baed6bde8b611ec1f384) to remediate the missing authorization vulnerability. In addition to patching, organizations should audit and strengthen access controls on the /show/integrations endpoint to ensure proper authorization enforcement. Network-level protections such as web application firewalls (WAFs) can be configured to monitor and block suspicious requests targeting this endpoint. Implementing strict network segmentation and limiting exposure of OpnForm instances to trusted networks reduces attack surface. Continuous monitoring and logging of access to integration endpoints should be enabled to detect potential exploitation attempts. Finally, organizations should update incident response plans to include this vulnerability and educate relevant staff on the risks and mitigation steps.