CVE-2025-67629 is a Stored Cross-site Scripting (XSS) vulnerability affecting the Basticom Framework, a web application framework used for building dynamic websites. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows malicious scripts to be stored on the server and later executed in the browsers of users who access the affected pages. This type of vulnerability is particularly dangerous because the malicious payload is persistent and can affect multiple users without requiring repeated attacker interaction. The affected versions include all releases up to and including 1.5.2. While no public exploit code is currently known, the vulnerability is publicly disclosed, increasing the risk of future exploitation. Attackers exploiting this vulnerability can perform actions such as stealing session cookies, redirecting users to malicious sites, or performing actions on behalf of authenticated users, thereby compromising confidentiality, integrity, and user trust. The lack of a CVSS score indicates that the vulnerability is newly published and not yet fully assessed, but the nature of stored XSS vulnerabilities generally implies a significant risk. The Basticom Framework is used in various web applications, and organizations relying on it should prioritize remediation. The vulnerability was reserved and published in December 2025, indicating recent discovery and disclosure.

For European organizations, exploitation of this stored XSS vulnerability could lead to significant security incidents including data theft, unauthorized access to sensitive information, and disruption of services. Organizations handling personal data under GDPR could face regulatory penalties if user data is compromised through such attacks. The persistent nature of stored XSS increases the risk of widespread impact across users of affected applications. Attackers could leverage this vulnerability to conduct phishing campaigns, spread malware, or escalate privileges within compromised systems. The reputational damage from successful attacks could be severe, especially for sectors like finance, healthcare, and government that rely heavily on web applications built with frameworks like Basticom. Additionally, the lack of available patches at the time of disclosure means organizations must implement interim mitigations to reduce risk. The impact is amplified in environments where the framework is integrated with critical business processes or customer-facing portals.

Organizations should immediately audit their use of the Basticom Framework and identify all affected instances running version 1.5.2 or earlier. Until official patches are released, implement strict input validation and sanitization on all user inputs, especially those reflected in web page generation. Employ robust output encoding techniques to neutralize any potentially malicious scripts before rendering content in browsers. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS payloads. Conduct thorough code reviews and penetration testing focused on XSS vectors within applications using the framework. Monitor web application logs for suspicious activities indicative of exploitation attempts. Plan for rapid deployment of official patches once available and maintain an incident response plan to address potential breaches. Educate developers and administrators about secure coding practices to prevent similar vulnerabilities in the future.