CVE-2025-46521 is a Stored Cross-Site Scripting (XSS) vulnerability identified in the WS Force Login Page component of the Silver Muru product line, affecting versions up to 3.0.3. The vulnerability arises due to improper neutralization of user-supplied input during web page generation, classified under CWE-79. Specifically, the WS Force Login Page fails to adequately sanitize or encode input before rendering it in the HTML output, allowing an attacker to inject malicious scripts that are stored persistently on the server. When a legitimate user accesses the affected page, the malicious script executes in their browser context. This type of stored XSS can be leveraged to steal session cookies, perform actions on behalf of the user, deface web content, or deliver further payloads such as malware. The vulnerability does not require user authentication to exploit, and no known public exploits have been reported to date. However, the presence of stored XSS in a login page is particularly concerning, as it targets a critical entry point to systems and may facilitate credential theft or session hijacking. The lack of available patches at the time of reporting indicates that affected organizations must rely on mitigation strategies until a vendor fix is released. The vulnerability was published on April 24, 2025, and has been enriched with CISA data, highlighting its relevance to cybersecurity stakeholders.

For European organizations, the impact of this vulnerability can be significant, especially for entities relying on Silver Muru's WS Force Login Page for authentication workflows. Exploitation could lead to unauthorized access through session hijacking or credential theft, undermining the confidentiality and integrity of user accounts and sensitive data. Organizations in sectors with stringent data protection requirements, such as finance, healthcare, and government, may face compliance risks under GDPR if user data is compromised. Additionally, the availability of services could be indirectly affected if attackers leverage the vulnerability to conduct phishing or social engineering campaigns targeting users. Since the vulnerability affects the login page, it may also erode user trust and damage organizational reputation. The absence of known exploits suggests a window of opportunity for proactive defense, but also means attackers could develop exploits rapidly once the vulnerability becomes widely known. The medium severity rating reflects the moderate complexity of exploitation balanced against the potential for impactful outcomes.

1. Immediate deployment of Web Application Firewalls (WAFs) with custom rules to detect and block suspicious input patterns targeting the WS Force Login Page, specifically filtering script tags and event handlers. 2. Implement strict Content Security Policy (CSP) headers to restrict the execution of inline scripts and limit sources of executable code, thereby mitigating the impact of any injected scripts. 3. Conduct thorough input validation and output encoding on all user-supplied data rendered on the login page, using context-aware encoding libraries to neutralize potentially malicious content. 4. Monitor web server and application logs for unusual input patterns or repeated access attempts to the login page that may indicate exploitation attempts. 5. Engage with Silver Muru to obtain timelines for official patches and apply them promptly once available. 6. Educate users and administrators about the risks of phishing and social engineering that could leverage this vulnerability. 7. Consider temporary alternative authentication mechanisms or additional multi-factor authentication layers to reduce risk exposure until the vulnerability is remediated.