CVE-2026-108490 in Premium Addons for Elementor Plugin
Summary
by MITRE • 10/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LeapWorx Premium Addons for Elementor premium-addons-for-elementor allows Stored XSS.This issue affects Premium Addons for Elementor: from n/a through 4.11.110.
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Analysis
by VulDB Data Team • 10/13/2026
The identified vulnerability represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this flaw manifests as a Stored XSS within the LeapWorx Premium Addons for Elementor plugin, affecting versions ranging from n/a through 4.11.110. Unlike reflected XSS attacks where malicious scripts are embedded in URLs and executed only when a victim clicks a specially crafted link, stored XSS vulnerabilities involve the persistence of malicious input on the target server. In this context, an attacker can inject executable JavaScript code into fields or inputs that are subsequently saved to the database without adequate sanitization. When other users visit pages containing these add-ons, the browser retrieves and executes the injected script in the context of the vulnerable website, leading to a persistent security compromise.
From a technical perspective, the root cause lies in the insufficient validation and encoding of user-supplied data before it is rendered within HTML content by the Elementor framework or its associated premium addons. The plugin fails to properly neutralize special characters that have semantic meaning in HTML, such as angle brackets, quotation marks, and ampersands. This oversight allows an attacker to break out of the expected data context and inject arbitrary script tags. Because the malicious payload is stored server-side, it does not require complex social engineering tactics like phishing links for each victim; instead, any user who views the compromised page will trigger the execution of the malicious code automatically.
The operational impact of this vulnerability is severe due to its persistent nature and broad potential reach. An attacker with low privileges or even anonymous access can exploit this flaw to steal session cookies, which may lead to account takeover if session fixation techniques are employed. Furthermore, the injected script can perform actions on behalf of the victim user, such as modifying site content, defacing web pages, or redirecting users to malicious sites designed for credential harvesting. In environments where multiple administrators or editors interact with the same WordPress installation, a single successful exploitation could compromise all accounts that view the affected page, significantly escalating the risk from individual account theft to full administrative control of the website infrastructure.
This vulnerability maps directly to CWE-79, which covers Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). Within the MITRE ATT&CK framework, this behavior aligns with T1059, Command and Control via Application Layer Protocol, specifically when used for initial access or persistence through stored payloads. It also relates to T1204, User Execution, as it relies on a user visiting the compromised page to trigger execution. The persistent storage aspect places it firmly in the category of Stored XSS, which is generally considered more dangerous than reflected variants due to its automated delivery mechanism and broader impact scope.
To mitigate this risk, immediate action is required by updating the Premium Addons for Elementor plugin to a version newer than 4.11.110, where the input sanitization logic has been corrected. If an update is not immediately feasible, administrators should implement strict Content Security Policy headers that restrict script execution sources and disable inline scripts using nonce-based policies or hash restrictions. Additionally, deploying a Web Application Firewall can help detect and block attempts to inject malicious payloads into form fields associated with these add-ons. Regular security audits of custom code and third-party plugins are essential to ensure that input validation follows the principle of least privilege and strict type checking is applied before data is persisted in the database or rendered in HTML contexts.