CVE-2025-62362 is a vulnerability classified under CWE-359 (Exposure of Private Personal Information to an Unauthorized Actor) found in the GPP-burgerportaal application, a citizen portal used by the Dutch government. The flaw exists in versions before 2.0.3, 3.0.2, and 4.0.1, where employee names and email addresses who publish content are inadvertently included in network responses. These responses can be inspected by anyone with access to the browser’s developer tools network tab, meaning no authentication or special privileges are required to obtain this information. The exposure of such personal information can violate privacy expectations and potentially enable attackers to conduct targeted phishing, spear-phishing, or social engineering attacks against employees. The vulnerability is remotely exploitable over the network without user interaction, making it relatively easy to exploit. Although no known exploits are currently in the wild, the risk remains significant due to the sensitivity of the data. The issue has been addressed in the patched versions 2.0.3, 3.0.2, and 4.0.1 of the application. No alternative mitigations or workarounds are available, so upgrading is the only effective remediation. The CVSS 4.0 base score of 6.9 reflects a medium severity, driven by the network attack vector, low complexity, no privileges or user interaction required, and limited confidentiality impact. Integrity and availability are not affected. The scope is limited to the GPP-burgerportaal application and its users.

For European organizations, particularly government entities and contractors in the Netherlands using GPP-burgerportaal, this vulnerability poses a privacy risk by exposing employee personal information such as names and email addresses. This exposure can lead to targeted phishing or social engineering campaigns, increasing the risk of credential theft, unauthorized access, or further compromise. While the vulnerability does not directly impact system integrity or availability, the indirect consequences of successful social engineering attacks could be severe, including data breaches or disruption of government services. The reputational damage from privacy violations could also be significant, especially under GDPR regulations which mandate strict protection of personal data. Other European countries using similar government portals or related GPP-Woo products might face similar risks if they deploy affected versions. The lack of known exploits reduces immediate risk but does not eliminate the threat, as attackers could develop exploits based on publicly available information.

The primary mitigation is to promptly upgrade all instances of GPP-burgerportaal to the patched versions 2.0.3, 3.0.2, or 4.0.1 depending on the version branch in use. Organizations should conduct an inventory of affected systems to ensure no outdated versions remain in production or staging environments. Implement strict access controls and monitoring on the portal to detect unusual access patterns or data scraping attempts. Educate employees about the potential for targeted phishing attacks leveraging exposed information and enforce strong email security measures such as DMARC, DKIM, and SPF. Consider deploying web application firewalls (WAFs) to monitor and block suspicious requests. Conduct regular privacy audits and penetration tests to verify that no sensitive information is exposed in network responses or logs. Since no workarounds exist, patching is critical. Finally, review and update incident response plans to address potential phishing or social engineering incidents stemming from this vulnerability.