CVE-2025-49928 is a DOM-based Cross-site Scripting (XSS) vulnerability identified in the CrocoBlock JetWooBuilder plugin, which is used to build WooCommerce product pages on WordPress sites. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected and executed in the victim's browser. This type of XSS is executed on the client side (DOM-based), meaning the malicious payload manipulates the Document Object Model after the page loads, bypassing some traditional server-side protections. The affected versions include all releases up to and including 2.1.20. The vulnerability requires an attacker to have low privileges (PR:L) and user interaction (UI:R), such as tricking a user into clicking a crafted link or visiting a malicious page. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) indicates network attack vector, low attack complexity, partial privileges, required user interaction, scope change (impacting other components), and low impact on confidentiality, integrity, and availability. While no known exploits are currently in the wild, the vulnerability poses a significant risk to websites using JetWooBuilder, especially e-commerce platforms relying on WooCommerce. Attackers could leverage this flaw to steal session cookies, deface pages, or execute malicious actions on behalf of users, potentially leading to data breaches or reputational damage. The vulnerability was reserved in June 2025 and published in October 2025, with no patch links currently provided, indicating that remediation may still be pending or in progress.

For European organizations, particularly those operating e-commerce websites using WooCommerce with the JetWooBuilder plugin, this vulnerability could lead to unauthorized access to user sessions, theft of sensitive customer data, and manipulation of web content. The partial compromise of confidentiality and integrity could result in exposure of personal data protected under GDPR, leading to regulatory penalties and loss of customer trust. Additionally, attackers could deface websites or inject malicious content, damaging brand reputation and causing financial losses. The requirement for user interaction means phishing or social engineering campaigns could be used to exploit this vulnerability, increasing the risk to end users. Given the widespread use of WooCommerce in Europe, especially in countries with mature e-commerce markets, the potential impact is significant. The vulnerability could also be leveraged as a foothold for further attacks within corporate networks if administrative users are targeted.

Organizations should monitor CrocoBlock’s official channels for patches addressing CVE-2025-49928 and apply updates promptly once available. Until patches are released, implement strict Content Security Policies (CSP) to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. Review and harden input validation and sanitization routines within customizations of JetWooBuilder or related plugins. Employ Web Application Firewalls (WAF) with rules targeting DOM-based XSS patterns to detect and block malicious payloads. Educate users and administrators about phishing risks and the importance of cautious interaction with untrusted links or content. Conduct regular security assessments and penetration tests focusing on client-side vulnerabilities. Additionally, restrict plugin usage to trusted sources and minimize the number of plugins to reduce the attack surface. Logging and monitoring for unusual user activity or script execution anomalies can help detect exploitation attempts early.