CVE-2025-49928 is a DOM-based Cross-site Scripting (XSS) vulnerability found in CrocoBlock's JetWooBuilder plugin, a tool used to build WooCommerce product pages and enhance e-commerce websites. The vulnerability arises from improper neutralization of input during web page generation, allowing malicious scripts to be injected and executed in the victim's browser environment. Specifically, the flaw exists in versions up to and including 2.1.20, where user-controllable input is not adequately sanitized or encoded before being incorporated into the DOM, leading to script execution. The attack vector is remote network-based (AV:N), with low attack complexity (AC:L), but requires low privileges (PR:L) and user interaction (UI:R), such as clicking a crafted link or visiting a malicious page. The vulnerability has a CVSS v3.1 base score of 6.5, reflecting medium severity, with partial impacts on confidentiality, integrity, and availability (C:L/I:L/A:L). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component, potentially impacting the entire web application. Although no known exploits have been reported in the wild, the vulnerability poses a risk to e-commerce sites relying on JetWooBuilder, as attackers could steal session cookies, perform actions on behalf of users, or deface content. The vulnerability was reserved in June 2025 and published in October 2025, with no patch links currently available, indicating that remediation is pending or in progress.

For European organizations, the impact of this vulnerability can be significant, especially for those operating e-commerce platforms using WooCommerce with the JetWooBuilder plugin. Successful exploitation could lead to theft of user credentials, session hijacking, unauthorized transactions, and reputational damage. The compromise of customer data could also lead to violations of GDPR and other data protection regulations, resulting in legal and financial penalties. The availability impact, while lower, could manifest as disruption of service or defacement, affecting customer trust and sales. Given the medium severity and requirement for user interaction, the risk is moderate but non-negligible. Attackers could target customers or employees through phishing or malicious links, leveraging the vulnerability to escalate access or conduct fraud. The interconnected nature of European e-commerce ecosystems means that a breach in one organization could have cascading effects, including supply chain risks. Therefore, timely mitigation is critical to protect both business operations and customer data privacy.

1. Monitor CrocoBlock's official channels for patches addressing CVE-2025-49928 and apply updates immediately upon release. 2. Until a patch is available, implement strict input validation and output encoding on all user-controllable inputs, especially those processed by JetWooBuilder. 3. Deploy a robust Content Security Policy (CSP) to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4. Limit user privileges within the WordPress environment to the minimum necessary, reducing the potential damage from compromised accounts. 5. Educate users and administrators about the risks of clicking untrusted links or interacting with suspicious content to mitigate the requirement for user interaction exploitation. 6. Conduct regular security audits and penetration testing focusing on web application vulnerabilities, including DOM-based XSS. 7. Consider implementing Web Application Firewalls (WAF) with rules tailored to detect and block XSS payloads targeting JetWooBuilder. 8. Review and harden the configuration of WooCommerce and related plugins to minimize attack surface and exposure.