CVE-2025-30941 is a vulnerability classified under CWE-79, indicating an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This specific vulnerability affects the Marvie Pons Pinterest Verify Meta Tag product, versions up to 1.3. The vulnerability allows for Stored XSS attacks, where malicious scripts injected by an attacker are permanently stored on the target server or application and executed when other users access the affected content. The vulnerability arises due to insufficient sanitization or encoding of user-supplied input before it is embedded into web pages, enabling attackers to inject arbitrary JavaScript code. The CVSS 3.1 base score is 5.9, indicating a medium severity level. 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 performed 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 medium (C:L/I:L/A:L). No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was reserved in March 2025 and published in June 2025. Stored XSS vulnerabilities can lead to session hijacking, defacement, phishing, or distribution of malware, especially if the affected meta tag is widely used or embedded in trusted websites.

For European organizations, the impact of CVE-2025-30941 depends largely on the extent to which the Marvie Pons Pinterest Verify Meta Tag is integrated into their web infrastructure. Organizations using this meta tag to verify Pinterest ownership or integrate Pinterest services could be at risk of stored XSS attacks, which may lead to unauthorized script execution in users' browsers. This could compromise user sessions, steal sensitive information, or facilitate further attacks such as phishing or malware distribution. Given the medium severity and the requirement for high privileges and user interaction, the risk is somewhat mitigated but still significant for organizations with high web traffic and user engagement. The change of scope indicates that the vulnerability could affect multiple components or users beyond the initial application boundary, increasing potential damage. European companies in e-commerce, digital marketing, and social media sectors, which often integrate Pinterest services, may face reputational damage, regulatory scrutiny under GDPR if personal data is compromised, and operational disruptions. The absence of known exploits suggests a window for proactive mitigation before widespread exploitation occurs.

1. Immediate review and sanitization of all user inputs that interact with the Pinterest Verify Meta Tag implementation to ensure proper encoding and neutralization of potentially malicious scripts. 2. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 3. Restrict privileges required to modify or deploy the Pinterest Verify Meta Tag to minimize the risk of high-privilege exploitation. 4. Monitor web application logs and user activity for unusual behavior indicative of XSS exploitation attempts. 5. Engage with the vendor Marvie Pons for official patches or updates addressing this vulnerability and apply them promptly once available. 6. Conduct regular security assessments and penetration testing focusing on XSS vectors in web applications using this meta tag. 7. Educate developers and administrators on secure coding practices related to input validation and output encoding, specifically for third-party integrations. 8. Consider temporary removal or replacement of the Pinterest Verify Meta Tag if immediate patching is not feasible, to eliminate the attack surface.