CVE-2025-46449 is a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, affecting the Novium WoWHead Tooltips product up to version 2.0.1. The vulnerability arises due to improper neutralization of user input during web page generation, allowing malicious scripts to be stored and later executed in the context of users visiting affected web pages. Stored XSS vulnerabilities occur when untrusted input is saved by the application and subsequently rendered without adequate sanitization or encoding, enabling attackers to inject arbitrary JavaScript code. This can lead to session hijacking, defacement, redirection to malicious sites, or unauthorized actions performed on behalf of the user. The WoWHead Tooltips product is typically used to enhance web content related to World of Warcraft by providing dynamic tooltips with game information. The lack of a patch or mitigation at the time of disclosure increases the risk of exploitation, although no known exploits in the wild have been reported yet. The vulnerability does not require authentication or user interaction beyond visiting a compromised or maliciously crafted page embedding the vulnerable tooltip component. Given the nature of Stored XSS, the scope of affected systems includes any web applications or websites integrating the vulnerable WoWHead Tooltips versions, potentially impacting a broad user base depending on deployment. The technical details confirm the issue was reserved and published on April 24, 2025, with enrichment from CISA, indicating recognition by cybersecurity authorities but no immediate active exploitation reported.

For European organizations, the impact of this Stored XSS vulnerability can be significant, especially for those operating gaming-related websites, fan communities, or content platforms that integrate WoWHead Tooltips. Exploitation could lead to theft of user credentials, session tokens, or personal data, undermining user trust and potentially violating GDPR regulations due to unauthorized data exposure. Additionally, attackers could use the vulnerability to deliver malware or phishing content, increasing the risk of broader compromise. The reputational damage and potential regulatory fines could be substantial. Since the vulnerability affects web content generation, any organization using the affected tooltips in customer-facing portals or internal dashboards could face risks to both confidentiality and integrity of data. The availability impact is generally low for XSS but could be indirectly affected if attackers leverage the vulnerability to conduct further attacks or cause service disruptions. The medium severity rating reflects these factors, balancing the ease of exploitation with the potential for impactful consequences in a European regulatory and threat landscape context.

1. Immediate removal or disabling of the WoWHead Tooltips component from web pages until a secure patch or update is available. 2. Implement strict input validation and output encoding on all user-supplied data rendered by the tooltips to neutralize malicious scripts, using context-appropriate encoding (e.g., HTML entity encoding). 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4. Conduct thorough security testing and code review of any custom integrations involving WoWHead Tooltips to identify and remediate injection points. 5. Monitor web application logs and user reports for suspicious activity indicative of XSS exploitation attempts. 6. Educate developers and content managers on secure coding practices and the risks associated with third-party components. 7. Once available, promptly apply vendor patches or updates addressing this vulnerability. 8. Consider implementing web application firewalls (WAF) with rules targeting XSS attack patterns as an additional protective layer.