CVE-2025-67629 is a stored Cross-site Scripting (XSS) vulnerability identified in the Basticom Framework, specifically affecting versions up to and including 1.5.2. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious scripts to be stored and later executed in the context of other users’ browsers. This type of vulnerability can be exploited when an attacker with limited privileges submits crafted input that is not properly sanitized or encoded, resulting in the injection of executable JavaScript or HTML code. The CVSS 3.1 base score is 5.4, reflecting a medium severity rating. The vector indicates network attack vector (AV:N), low attack complexity (AC:L), requires privileges (PR:L), user interaction (UI:R), scope changed (S:C), and impacts confidentiality and integrity at a low level (C:L/I:L), with no impact on availability (A:N). Exploiting this vulnerability could allow attackers to steal session cookies, perform actions on behalf of authenticated users, or manipulate displayed content, potentially leading to further compromise or data leakage. Although no known exploits are currently reported in the wild, the vulnerability’s presence in a web application framework used to build web applications means that any dependent applications could be at risk. The lack of available patches or mitigations at the time of publication necessitates immediate attention from developers and administrators using Basticom Framework.

For European organizations, the impact of CVE-2025-67629 can be significant, especially for those relying on the Basticom Framework for web application development. Successful exploitation could lead to unauthorized disclosure of sensitive information, such as user credentials or session tokens, undermining confidentiality. Integrity could be compromised by attackers injecting malicious scripts that alter the behavior or content of web applications, potentially facilitating further attacks like phishing or privilege escalation. Although availability is not directly affected, the reputational damage and potential regulatory consequences under GDPR for data breaches could be substantial. Organizations in sectors such as finance, healthcare, and government, which often deploy web applications built on frameworks like Basticom, may face increased risks. The requirement for user interaction and privileges limits the ease of exploitation but does not eliminate the threat, especially in environments with many users or lower privilege separation. The absence of known exploits in the wild provides a window for proactive mitigation before widespread attacks occur.

To mitigate CVE-2025-67629, European organizations should implement the following specific measures: 1) Immediately audit all web applications built on Basticom Framework versions up to 1.5.2 to identify vulnerable endpoints where user input is reflected or stored without proper sanitization. 2) Apply strict input validation and output encoding on all user-supplied data, using context-aware encoding libraries to neutralize potentially malicious scripts. 3) Monitor vendor communications closely for official patches or updates and apply them promptly once available. 4) Employ Web Application Firewalls (WAFs) with custom rules to detect and block typical XSS payloads targeting Basticom Framework applications. 5) Conduct security awareness training for users to recognize and avoid interacting with suspicious links or content that could trigger stored XSS attacks. 6) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 7) Regularly perform security testing, including automated scanning and manual penetration testing focused on XSS vulnerabilities in affected applications. 8) Limit user privileges and enforce the principle of least privilege to reduce the impact of potential exploitation. These steps go beyond generic advice by focusing on the specific context of Basticom Framework and stored XSS attack vectors.