CVE-2025-53467 is a medium severity vulnerability classified under CWE-79, which corresponds to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects the webvitaly product named Login-Logout, specifically versions up to 3.8. The issue allows an attacker to inject malicious scripts that are stored persistently (Stored XSS) within the application. When a victim user accesses the affected web pages, the malicious script executes in their browser context. The CVSS 3.1 base score is 5.9, indicating a medium level of severity. The vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L reveals that the attack can be launched remotely over the network (AV:N) with low attack complexity (AC:L), but requires high privileges (PR:H) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is low to limited (C:L/I:L/A:L). Stored XSS vulnerabilities are dangerous because they can be used to steal user credentials, hijack sessions, perform actions on behalf of users, or deliver malware. However, the requirement for high privileges and user interaction reduces the ease of exploitation. No known exploits are reported in the wild yet, and no patches are currently linked, indicating that remediation may still be pending or in progress. The vulnerability was reserved in June 2025 and published in September 2025, suggesting it is a recent discovery.

For European organizations using the webvitaly Login-Logout product, this vulnerability poses a risk of session hijacking, credential theft, and unauthorized actions performed by attackers leveraging stored XSS. Since the vulnerability requires high privileges to exploit, it is more likely to be leveraged by insiders or attackers who have already gained elevated access, potentially escalating their control within the system. The user interaction requirement means phishing or social engineering may be necessary to trigger the attack. The impact on confidentiality, integrity, and availability is limited but non-negligible, especially for organizations handling sensitive user data or critical authentication workflows. Exploitation could lead to compromised user accounts, unauthorized access to internal resources, and reputational damage. European organizations in sectors such as finance, healthcare, and government, which rely on secure authentication mechanisms, could face regulatory scrutiny under GDPR if user data is exposed or misused due to this vulnerability. The absence of known exploits reduces immediate risk but also underscores the importance of proactive mitigation.

1. Immediate mitigation should include implementing strict input validation and output encoding on all user-supplied data within the Login-Logout application to prevent injection of malicious scripts. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 3. Conduct a thorough code review focusing on areas where user input is reflected or stored and rendered in web pages, ensuring proper sanitization. 4. Restrict high privilege access to the Login-Logout system to trusted personnel only, and monitor for unusual activities that could indicate exploitation attempts. 5. Educate users and administrators about the risks of phishing and social engineering attacks that could trigger the stored XSS payload. 6. Monitor vendor advisories for patches or updates addressing this vulnerability and apply them promptly once available. 7. Consider deploying Web Application Firewalls (WAFs) with rules targeting XSS attack patterns as an interim protective measure. 8. Implement multi-factor authentication (MFA) to reduce the impact of credential theft resulting from XSS exploitation.