CVE-2024-29913 in Tutor LMS Elementor Addons Plugin
Summary
by MITRE • 03/27/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Themeum Tutor LMS Elementor Addons allows Stored XSS.This issue affects Tutor LMS Elementor Addons: from n/a through 2.1.3.
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Analysis
by VulDB Data Team • 04/12/2025
This vulnerability represents a critical cross-site scripting flaw in the Themeum Tutor LMS Elementor Addons plugin, specifically within the web page generation process where input validation and sanitization mechanisms fail to properly neutralize user-supplied data. The stored nature of this vulnerability means that malicious payloads can be permanently injected into the application's database and subsequently executed whenever affected pages are rendered to other users, creating a persistent security risk that can affect multiple visitors over time.
The technical implementation of this flaw stems from inadequate input sanitization during the web page generation phase, where user-provided content is directly incorporated into HTML output without proper escaping or validation measures. This allows attackers to inject malicious javascript code through various input fields within the plugin's interface, which gets stored and executed in the browsers of unsuspecting users who visit pages containing the malicious content. The vulnerability exists across all versions from the initial release through version 2.1.3, indicating a long-standing issue that has not been adequately addressed.
The operational impact of this stored XSS vulnerability is significant as it enables attackers to perform a wide range of malicious activities including session hijacking, credential theft, redirection to malicious sites, and data exfiltration from user browsers. An attacker could potentially steal administrator credentials, modify course content, inject malicious advertisements, or even escalate privileges within the compromised system. The persistent nature of stored XSS means that the attack can continue to affect users long after the initial injection, making it particularly dangerous for educational platforms where user trust and data integrity are paramount.
The vulnerability aligns with CWE-79 which specifically addresses Cross-site Scripting flaws in web applications, and maps to ATT&CK technique T1566.001 for initial access through malicious web content. Organizations using this plugin should immediately implement mitigations including updating to the latest version where the vulnerability has been patched, implementing proper input validation and output encoding at all points where user data is processed, and conducting thorough security reviews of all user-supplied content handling mechanisms. Additionally, network-based mitigations such as web application firewalls and content security policies should be deployed to provide additional defense-in-depth layers against exploitation attempts.
The remediation approach requires immediate patching of the vulnerable plugin to version 2.1.4 or later, which should contain proper input sanitization and output encoding measures. Administrators should also implement comprehensive logging and monitoring of user input fields, establish regular security audits of plugin components, and educate users about the risks of submitting untrusted content to the platform. Organizations should consider implementing automatic update mechanisms for third-party plugins to ensure timely vulnerability remediation and maintain a comprehensive security posture against evolving threats in the educational technology landscape.