CVE-2025-62757 is a DOM-based Cross-site Scripting (XSS) vulnerability classified under CWE-79, found in WebMan Amplifier, a product developed by WebMan Design | Oliver Juhas. The flaw stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious actors to inject and execute arbitrary JavaScript code in the victim’s browser environment. This type of XSS is client-side, occurring when the web application processes untrusted data in the Document Object Model (DOM) without proper sanitization or encoding. The vulnerability affects all versions up to 1.5.12, with no specific earliest affected version identified. The CVSS 3.1 base score of 6.5 indicates a medium severity, with attack vector being network-based, requiring low privileges and user interaction, and impacting confidentiality, integrity, and availability with a scope change (S:C). The vulnerability can lead to session hijacking, defacement, or redirection to malicious sites, compromising user data and trust. No public exploits or patches are currently available, increasing the urgency for organizations to implement defensive measures. The vulnerability was reserved in October 2025 and published at the end of 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a risk primarily to web applications and services utilizing WebMan Amplifier, potentially exposing end-users to session theft, credential compromise, or malware delivery via injected scripts. The impact extends to the confidentiality of user data, integrity of web content, and availability if attackers leverage the vulnerability to disrupt services. Organizations in sectors relying heavily on web-based media amplification, such as digital marketing, broadcasting, and content delivery, may face reputational damage and regulatory scrutiny under GDPR if user data is compromised. The requirement for user interaction and low privilege reduces the risk somewhat but does not eliminate it, especially in environments with high user traffic or where social engineering can facilitate exploitation. The absence of known exploits in the wild suggests a window for proactive mitigation before active attacks emerge.

European organizations should implement strict input validation and output encoding on all user-supplied data processed by WebMan Amplifier to prevent injection of malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. Regularly audit and monitor web application logs for unusual activity indicative of attempted exploitation. Since no patches are currently available, consider isolating or limiting access to affected WebMan Amplifier instances, especially from untrusted networks. Educate users about the risks of interacting with suspicious links or content that could trigger the vulnerability. Engage with the vendor for timely updates and patches, and plan for rapid deployment once fixes are released. Additionally, implement web application firewalls (WAF) with rules tailored to detect and block DOM-based XSS payloads targeting this product.