CVE-2025-48376 is a vulnerability identified in the DNN Platform (formerly DotNetNuke), an open-source web content management system widely used within the Microsoft ecosystem. The vulnerability is classified under CWE-841, which pertains to improper enforcement of behavioral workflow. Specifically, prior to version 9.13.9, a malicious SuperUser (Host) with high privileges could exploit the system by crafting a specially designed request to export a site using an external URL. This crafted export could then be imported back into the system, potentially leading to unintended behavior or disruption. The vulnerability arises because the platform does not properly enforce restrictions on the workflow of site export and import processes, allowing the use of external URLs in a manner not intended by the system's design. This flaw could result in limited integrity and availability impacts, such as the introduction of unauthorized or malformed content during import or disruption of site functionality. The vulnerability requires high privileges (SuperUser/Host) and user interaction (crafting and submitting the request), but does not impact confidentiality. The CVSS 3.1 base score is 3.5, indicating a low severity level. The issue was addressed in version 9.13.9 of DNN Platform, which enforces proper workflow controls to prevent the use of external URLs in site exports. There are no known exploits in the wild at this time, and no patch links were provided beyond the version update. Given the nature of the vulnerability, it primarily affects environments where DNN Platform is deployed and where users have SuperUser privileges, emphasizing the importance of privilege management and version control.

For European organizations using DNN Platform versions prior to 9.13.9, this vulnerability could lead to limited integrity and availability issues. A malicious SuperUser could manipulate site export/import workflows to introduce unauthorized content or disrupt site operations. While the confidentiality of data is not directly impacted, the integrity of website content and availability of web services could be compromised, potentially affecting business operations and user trust. The impact is mitigated by the requirement for high-level privileges and user interaction, limiting the risk to insider threats or compromised administrative accounts. Organizations relying on DNN for critical web presence or internal portals should be aware that exploitation could cause service disruptions or content tampering, which may have reputational and operational consequences. Given the low CVSS score and absence of known exploits, the immediate risk is low but should not be ignored, especially in sectors where web content integrity is crucial, such as government, finance, and healthcare.

European organizations should prioritize upgrading DNN Platform installations to version 9.13.9 or later to remediate this vulnerability. Beyond patching, organizations must enforce strict access controls to limit SuperUser privileges to trusted personnel only, reducing the risk of insider exploitation. Implementing robust monitoring and logging of export/import activities can help detect anomalous behavior indicative of exploitation attempts. Additionally, organizations should review and restrict the use of external URLs in site export/import workflows where possible. Regular security audits and user privilege reviews will further minimize risk. Employing web application firewalls (WAFs) configured to detect and block suspicious requests related to export/import operations can provide an additional layer of defense. Finally, educating administrators about the risks associated with misuse of SuperUser privileges and ensuring secure credential management are critical to preventing exploitation.