CVE-2024-49659 in Coub Plugin
Summary
by MITRE • 10/29/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Coub Coub coub allows DOM-Based XSS.This issue affects Coub: from n/a through <= 1.4.
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Analysis
by VulDB Data Team • 04/07/2026
The vulnerability CVE-2024-49659 represents a critical cross-site scripting weakness in the Coub coub platform that specifically manifests as a DOM-based XSS flaw. This vulnerability arises from insufficient input sanitization during web page generation processes, creating an avenue for malicious actors to inject harmful scripts into the application's dynamic content. The issue is particularly concerning because it operates at the DOM level rather than traditional server-side input handling, making it more subtle and potentially harder to detect through standard security measures. The vulnerability affects all versions of Coub up to and including version 1.4, indicating a widespread exposure across the platform's user base.
The technical flaw stems from the application's failure to properly neutralize user-supplied input before incorporating it into dynamically generated web pages. When users interact with the platform, their input is processed through the DOM without adequate sanitization, allowing malicious scripts to execute within the context of other users' browsers. This DOM-based XSS vulnerability leverages the browser's Document Object Model to inject malicious code that can persist and execute across different user sessions. The vulnerability is categorized under CWE-79 as Improper Neutralization of Input During Web Page Generation, which specifically addresses the lack of proper input validation and sanitization in web applications. The attack vector typically involves manipulating URL parameters or user-provided content to inject script payloads that execute in the victim's browser context.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session hijacking, steal sensitive user data, manipulate application functionality, and conduct further attacks within the compromised user's browser environment. An attacker could exploit this vulnerability to access user accounts, modify content, redirect users to malicious sites, or even install malware through the compromised browser sessions. The DOM-based nature of the vulnerability means that even if server-side input validation is properly implemented, client-side script execution can still be exploited to compromise user sessions. This vulnerability directly aligns with ATT&CK technique T1059.007 for Scripting and T1531 for Account Access Removal, as it enables attackers to manipulate application behavior and potentially gain unauthorized access to user accounts.
Mitigation strategies should focus on implementing comprehensive input sanitization at multiple layers of the application architecture. The primary defense involves proper encoding and validation of all user-supplied input before it is processed or rendered in the DOM. Implementing Content Security Policy headers can significantly reduce the impact of successful XSS attempts by restricting script execution. Additionally, the application should employ proper output encoding for all dynamic content, particularly when incorporating user data into JavaScript contexts. Regular security code reviews and automated vulnerability scanning should be implemented to identify similar issues in other parts of the application. The platform should also consider implementing a robust input validation framework that specifically addresses DOM-based XSS vulnerabilities, including the use of secure coding practices such as using DOM-safe methods for dynamic content manipulation. Organizations should also establish incident response procedures to quickly address any exploitation attempts and ensure user data protection through proper monitoring and logging of suspicious activities.