CVE-2025-49939 is a stored Cross-site Scripting (XSS) vulnerability identified in the CrocoBlock JetElements plugin for Elementor, a popular WordPress page builder. The vulnerability exists due to improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored and later executed in the context of users visiting the affected site. This flaw affects all versions of JetElements up to and including 2.7.8. The attack vector requires network access (remote), low attack complexity, and privileges requiring limited user authentication, with user interaction necessary to trigger the exploit. The vulnerability impacts confidentiality, integrity, and availability by enabling attackers to execute arbitrary JavaScript in victims' browsers, potentially stealing session cookies, defacing websites, or performing actions on behalf of users. The vulnerability has a CVSS v3.1 base score of 6.5, categorized as medium severity, reflecting a moderate risk level. No public exploit code or active exploitation has been reported to date. The vulnerability was reserved in June 2025 and published in October 2025, with no official patches currently linked, indicating that users must monitor for updates. The vulnerability is particularly relevant to organizations using JetElements in their WordPress environments, especially those with public-facing websites where attackers can inject and store malicious scripts. Given the widespread use of WordPress and Elementor in Europe, this vulnerability poses a tangible risk to many web properties.

For European organizations, this vulnerability can lead to unauthorized execution of malicious scripts within the browsers of site visitors or administrators, potentially resulting in session hijacking, data theft, website defacement, or unauthorized actions performed with user privileges. This can damage organizational reputation, lead to data breaches involving personal or sensitive information, and disrupt service availability. E-commerce platforms, government portals, and service providers using JetElements are particularly at risk, as exploitation could compromise customer trust and regulatory compliance under GDPR. The requirement for limited privileges and user interaction somewhat reduces the risk but does not eliminate it, especially in environments with multiple user roles or where social engineering can be leveraged. The absence of known exploits in the wild provides a window for proactive mitigation, but the medium severity score indicates that organizations should not delay remediation efforts. Additionally, the scope of affected systems is broad given the popularity of WordPress and Elementor in Europe, increasing the potential impact across multiple sectors.

1. Monitor CrocoBlock and Elementor official channels for security patches addressing CVE-2025-49939 and apply updates immediately upon release. 2. Implement strict input validation and output encoding on all user-supplied data fields within JetElements components to prevent script injection. 3. Deploy and fine-tune Web Application Firewalls (WAFs) with rules specifically targeting XSS payloads, including those known to exploit JetElements. 4. Limit user privileges to the minimum necessary, reducing the risk posed by authenticated attackers. 5. Conduct regular security audits and penetration testing focusing on web application vulnerabilities, including stored XSS. 6. Educate site administrators and users about the risks of clicking on suspicious links or interacting with untrusted content to reduce successful exploitation via social engineering. 7. Review and harden Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. 8. Monitor web server and application logs for unusual activity indicative of attempted or successful exploitation. 9. Consider temporarily disabling or restricting JetElements features that accept user input until patches are applied.