CVE-2025-49939 identifies a stored cross-site scripting (XSS) vulnerability in the CrocoBlock JetElements plugin for Elementor, a widely used WordPress page builder add-on. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows malicious scripts to be stored and later executed in the context of users visiting the affected site. Specifically, versions up to and including 2.7.8 are vulnerable. The attack vector is network-based, requiring low attack complexity but does require the attacker to have low privileges (authenticated user) and for the victim to interact with the malicious content (UI required). The vulnerability impacts confidentiality, integrity, and availability to a limited extent, as attackers can execute scripts that may steal session tokens, manipulate page content, or perform actions on behalf of users. The scope is changed (S:C) because the vulnerability affects resources beyond the attacker’s privileges. No known exploits are currently reported in the wild, but the potential for exploitation exists given the popularity of Elementor and CrocoBlock plugins. The CVSS 3.1 base score is 6.5, indicating medium severity. The lack of available patches at the time of reporting necessitates immediate attention to mitigation strategies.

The impact of CVE-2025-49939 is significant for organizations using the CrocoBlock JetElements plugin on their WordPress sites. Successful exploitation can lead to stored XSS attacks, enabling attackers to execute arbitrary JavaScript in the context of site visitors. This can result in theft of sensitive information such as authentication cookies, session tokens, or personal data, potentially leading to account takeover or unauthorized actions. Additionally, attackers may deface websites, inject malicious content, or redirect users to phishing or malware sites, damaging brand reputation and user trust. The vulnerability affects the integrity and availability of web applications by allowing unauthorized script execution and potential denial of service through script abuse. Given the widespread use of Elementor and its add-ons, many small to medium businesses, e-commerce sites, and content publishers globally could be impacted, especially those that do not promptly update or implement compensating controls.

To mitigate CVE-2025-49939, organizations should: 1) Monitor CrocoBlock’s official channels for patches and apply updates to JetElements For Elementor promptly once available. 2) Implement strict input validation and sanitization on all user inputs, especially those rendered on web pages, to prevent injection of malicious scripts. 3) Deploy Content Security Policy (CSP) headers to restrict execution of unauthorized scripts and reduce the impact of XSS attacks. 4) Limit user privileges to the minimum necessary, reducing the risk posed by low-privilege attackers. 5) Conduct regular security audits and penetration testing focused on plugin vulnerabilities. 6) Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content. 7) Consider using Web Application Firewalls (WAFs) with rules designed to detect and block XSS payloads targeting WordPress plugins. These steps provide layered defense until official patches are released and applied.