CVE-2025-49927 is a stored Cross-site Scripting (XSS) vulnerability identified in CrocoBlock's JetWooBuilder plugin, a tool used to customize WooCommerce product pages on WordPress sites. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows an attacker with at least limited privileges (PR:L) to inject malicious scripts that are stored and later executed in the browsers of other users who view the affected pages. Exploitation requires user interaction (UI:R), such as a victim visiting a maliciously crafted page or product listing. The vulnerability affects all versions up to and including 2.1.20.1. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) indicates that the attack can be launched remotely over the network with low attack complexity, requires some privileges, and user interaction, but can impact confidentiality, integrity, and availability with a scope change (S:C). The vulnerability can lead to theft of session cookies, defacement, or redirection to malicious sites, potentially compromising user accounts and sensitive data. No public exploits have been reported yet, but the presence of stored XSS in an e-commerce context makes it a significant risk. The vulnerability was reserved in June 2025 and published in October 2025, with no patch links currently available, indicating that remediation may be pending or in progress.

For European organizations, especially those operating e-commerce platforms using WooCommerce with JetWooBuilder, this vulnerability poses a risk of account takeover, data leakage, and reputational damage. Stored XSS can be exploited to hijack user sessions, steal credentials, or perform actions on behalf of legitimate users, potentially leading to financial fraud or unauthorized access to customer data. The impact extends to customer trust and compliance with data protection regulations such as GDPR, as exploitation could result in unauthorized disclosure of personal data. Additionally, the scope change in the CVSS vector suggests that the vulnerability could affect components beyond the immediate plugin, potentially impacting other integrated systems. Organizations with high volumes of online transactions or sensitive customer information are at greater risk. The lack of known exploits currently reduces immediate threat but does not eliminate the risk, as attackers may develop exploits once patches are released or if the vulnerability details become widely known.

1. Monitor CrocoBlock's official channels for patches addressing CVE-2025-49927 and apply them promptly once available. 2. Until patches are released, restrict user input fields to disallow HTML or JavaScript content where possible, using strict input validation and sanitization. 3. Implement a robust Content Security Policy (CSP) to limit the execution of unauthorized scripts and reduce the impact of XSS attacks. 4. Limit user privileges to the minimum necessary, especially for users who can submit content that appears on product pages. 5. Conduct regular security audits and code reviews of customizations involving JetWooBuilder to identify and remediate unsafe input handling. 6. Employ Web Application Firewalls (WAF) with rules targeting XSS payloads to detect and block exploitation attempts. 7. Educate administrators and users about the risks of clicking suspicious links or interacting with untrusted content. 8. Monitor logs and user activity for signs of exploitation, such as unusual account behavior or injection attempts. 9. Consider isolating or disabling JetWooBuilder features that accept user-generated content until a patch is applied.