CVE-2024-50467 in Scrollbar Plugin
Summary
by MITRE • 10/28/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in siteengineai Scrollbar by webxapp – Best vertical/horizontal scrollbars plugin scrollbar-by-webxapp allows Stored XSS.This issue affects Scrollbar by webxapp – Best vertical/horizontal scrollbars plugin: from n/a through <= 1.3.0.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/06/2026
The vulnerability CVE-2024-50467 represents a critical cross-site scripting weakness in the Scrollbar by webxapp plugin, which is designed to enhance vertical and horizontal scrollbar functionality on websites. This issue falls under the category of improper input neutralization during web page generation, a well-documented security flaw that enables attackers to inject malicious scripts into web applications. The vulnerability specifically affects versions of the plugin from the initial release through version 1.3.0, indicating a prolonged period during which this security gap remained unaddressed. The affected plugin operates as a client-side enhancement tool that modifies scroll behavior on web pages, making it a potential vector for persistent XSS attacks that can compromise user sessions and data integrity.
The technical flaw manifests when the plugin fails to properly sanitize user input that gets incorporated into dynamically generated web pages. This improper neutralization creates an environment where malicious actors can store malicious scripts within the plugin's configuration parameters or user data fields. When other users access pages that utilize the compromised plugin, these stored scripts execute in their browsers, potentially stealing session cookies, redirecting users to malicious sites, or performing unauthorized actions on their behalf. The vulnerability's classification as stored XSS means that the malicious code is permanently saved on the server and executed every time the affected page is loaded, making it particularly dangerous for websites that rely on user-generated content or configuration data.
The operational impact of this vulnerability extends beyond simple script execution, as it can lead to comprehensive session hijacking and data exfiltration attacks. Attackers who exploit this vulnerability can establish persistent access to user accounts, potentially compromising sensitive information and website administration capabilities. The affected plugin's widespread use across various websites means that a successful exploitation could impact numerous end users simultaneously. This vulnerability directly maps to CWE-79, which specifically addresses cross-site scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through malicious content. The risk is amplified by the fact that the plugin operates at the client-side level, making detection and prevention challenging for traditional server-side security measures.
Mitigation strategies should prioritize immediate plugin updates to versions that address the XSS vulnerability, as well as implementing comprehensive input validation and output encoding mechanisms. Website administrators must conduct thorough security assessments of all installed plugins and ensure proper sanitization of all user inputs before processing. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security monitoring and penetration testing should be conducted to identify similar vulnerabilities. Organizations should also consider implementing web application firewalls to detect and block malicious script injection attempts. The vulnerability highlights the critical importance of maintaining up-to-date third-party components and establishing robust security protocols for plugin integration, as even seemingly benign enhancements can introduce significant security risks.