CVE-2026-103064 in Elementskit Elementor Addons Lite Plugin
Summary
by MITRE • 10/01/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wpmet ElementsKit Elementor addons Lite elementskit-lite allows Stored XSS.This issue affects ElementsKit Elementor addons Lite: from n/a through 4.0.6.
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Analysis
by VulDB Data Team • 10/01/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests as a Stored XSS within the ElementsKit Elementor addons Lite plugin for WordPress. Unlike reflected XSS attacks where malicious scripts are executed via manipulated URLs in real-time during user interaction, stored vulnerabilities persist on the target server. In this context, an attacker can inject malicious JavaScript code into input fields that are subsequently saved to the database without proper sanitization or validation. When other users or administrators later view the affected content, the browser interprets and executes the embedded script as if it were legitimate part of the web page. This persistence mechanism significantly amplifies the risk profile because the payload does not require social engineering tricks like phishing links for each execution; instead, every visitor to the compromised area becomes a potential victim automatically upon loading the page.
The technical root cause lies in the insufficient filtering and escaping mechanisms applied by the ElementsKit Elementor addons Lite plugin when processing user-supplied data before rendering it back into HTML output. The software version range affected spans from no specific lower bound through version 4.0.6, indicating that this issue has persisted across multiple releases if not addressed via patches. By failing to neutralize special characters such as angle brackets, quotes, and ampersands within user inputs like comments, profile fields, or custom widget settings, the application allows arbitrary script injection. This failure violates fundamental web security principles regarding input validation and output encoding, which are critical for maintaining the integrity of client-side execution contexts. The lack of robust sanitization routines means that even seemingly innocuous text entries can carry executable payloads designed to exploit browser trust in the domain hosting the vulnerable site.
The operational impact of this vulnerability is severe due to its stored nature. Successful exploitation allows attackers to steal session cookies, hijack administrative accounts, deface websites, or redirect users to malicious sites for further attacks such as malware distribution or credential harvesting. Since WordPress plugins often have broad permissions within a CMS environment, an attacker leveraging Stored XSS in ElementsKit could potentially escalate privileges if the victim is an administrator with elevated access rights. This can lead to complete compromise of the underlying server infrastructure, data exfiltration from connected databases, and significant reputational damage for site owners who rely on trust-based interactions with their audience. The persistence of the payload ensures that the impact continues over time until the malicious content is manually removed or the vulnerability is patched, creating a prolonged window of exposure.
To mitigate this risk, immediate action must be taken by updating the ElementsKit Elementor addons Lite plugin to a version later than 4.0.6 where these input handling flaws have been corrected. Developers should implement strict allow-list based validation for all user inputs and ensure that output encoding is applied consistently across all templates using frameworks like Twig or native WordPress escaping functions such as esc_html, esc_attr, and wp_kses_post. Security monitoring tools including Web Application Firewalls can provide an additional layer of defense by detecting and blocking known XSS payload patterns in HTTP requests. Furthermore, regular security audits and code reviews focusing on data flow from input sources to output sinks are essential for preventing similar vulnerabilities in future updates. Organizations should also enforce Content Security Policy headers where feasible to limit the execution context of injected scripts even if they manage to bypass other defenses.