CVE-2026-39737 in JetElements Plugin
Summary
by MITRE • 10/29/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Crocoblock JetElements For Elementor jet-elements allows Stored XSS.This issue affects JetElements For Elementor: from n/a through 2.9.2.6.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/29/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly categorized under the Cross-Site Scripting (XSS) vulnerability class. Specifically, this is a Stored XSS vulnerability affecting the Crocoblock JetElements plugin for WordPress, which integrates with the Elementor page builder ecosystem. The vulnerability exists in versions ranging from the initial release up through version 2.9.2.6. Unlike reflected XSS attacks where malicious scripts are executed via manipulated URLs or form submissions that do not persist on the server, stored XSS vulnerabilities involve the injection of malicious content into a website's database or persistent storage. When this tainted data is subsequently retrieved and rendered in web pages for other users, the embedded script executes within their browsers, leading to significant security implications.
From a technical perspective, the flaw likely stems from insufficient sanitization or validation of user-supplied input fields that are processed by JetElements features such as custom HTML widgets, form submissions, or dynamic content modules. When an attacker successfully injects malicious JavaScript code into these inputs, the application fails to escape special characters or strip executable script tags before storing them in the backend database. Consequently, when any visitor loads a page containing this compromised data, their browser interprets and executes the injected scripts as if they were part of the legitimate website content. This mechanism allows the attacker to bypass same-origin policies that typically restrict how documents interact with each other, thereby gaining unauthorized access to sensitive information or functionality on behalf of the victim user.
The operational impact of this vulnerability is severe due to its persistent nature and potential for widespread exploitation. Attackers can leverage stored XSS to steal session cookies, authentication tokens, or personal identifiable information (PII) from users who view the infected content. This data theft facilitates account takeover attacks, allowing adversaries to impersonate legitimate users within the WordPress environment. Furthermore, attackers may use this access to deface websites by altering visual elements, redirect traffic to malicious phishing sites, or deploy further malware payloads such as keyloggers or ransomware onto victim systems. In enterprise environments where multiple administrators and editors contribute content, a single compromised account could lead to widespread dissemination of the malicious payload across numerous pages, amplifying the blast radius significantly compared to transient vulnerabilities.
In terms of industry-standard classification frameworks, this vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). The specific attack vector corresponds to MITRE ATT&CK technique T1059.007, which denotes Command and Scripting Interpreter via JavaScript in the context of web application attacks. Additionally, it relates to CWE-834 regarding Excessive Iteration if the vulnerability involves loops that exacerbate resource consumption during exploitation, though the primary concern remains data exfiltration and session hijacking under OWASP Top 10 categories for A7: Cross-Site Scripting (XSS). Understanding these mappings helps security teams prioritize remediation efforts based on established risk assessment methodologies.
To mitigate this vulnerability, immediate action is required to update the JetElements plugin to a patched version released after 2.9.2.6 by Crocoblock. Developers and site administrators should ensure that all third-party WordPress plugins are kept current with their latest security patches. For environments where updating is not immediately feasible, implementing Web Application Firewalls (WAFs) can provide an additional layer of defense by filtering out malicious input patterns before they reach the application logic. Input validation strategies must be enforced rigorously on both client and server sides, ensuring that only expected data types are accepted while encoding output to prevent script execution. Regular security audits and penetration testing focused on stored XSS vectors should also be conducted to identify similar weaknesses in other custom or third-party components within the WordPress infrastructure.