CVE-2024-8720 in RumbleTalk Live Group Chat Plugin
Summary
by MITRE • 10/01/2024
The RumbleTalk Live Group Chat – HTML5 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'rumbletalk-admin-button' shortcode in all versions up to, and including, 6.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 03/09/2025
The CVE-2024-8720 vulnerability affects the RumbleTalk Live Group Chat HTML5 plugin for WordPress, representing a critical stored cross-site scripting weakness that has significant implications for WordPress site security. This vulnerability exists within the plugin's rumbletalk-admin-button shortcode functionality and impacts all versions up to and including 6.3.0, making it a widespread concern for administrators who have not updated their installations. The flaw stems from inadequate input sanitization and output escaping mechanisms that fail to properly validate or escape user-supplied attributes before processing them within the plugin's shortcode implementation. This security gap allows malicious actors with contributor-level access or higher to exploit the vulnerability and inject malicious scripts that will execute whenever users access pages containing the injected content.
The technical nature of this vulnerability places it squarely within the CWE-79 category of Cross-Site Scripting, specifically classified as a stored XSS flaw that enables attackers to persist malicious code within the application's database. The vulnerability operates through the plugin's shortcode processing mechanism where user-provided attributes are not adequately sanitized before being rendered in the output, creating an environment where attacker-controlled data can be executed in the context of other users' browsers. This particular implementation flaw allows authenticated attackers to leverage their privileges to inject malicious scripts that can perform actions such as stealing session cookies, redirecting users to malicious sites, or executing arbitrary commands on behalf of the victims. The attack vector requires minimal privileges since contributors can exploit this vulnerability, making it particularly dangerous as it can be leveraged by users who have basic content management capabilities within WordPress.
The operational impact of CVE-2024-8720 extends beyond simple script execution as it represents a serious threat to user data integrity and application security. When authenticated attackers successfully exploit this vulnerability, they can effectively compromise the browsing sessions of other users who access pages containing the injected malicious content, potentially leading to account takeovers, data exfiltration, or further exploitation within the compromised WordPress environment. The stored nature of this XSS vulnerability means that the malicious scripts persist in the database and will execute automatically whenever affected pages are accessed, making detection and remediation more challenging than reflected XSS attacks. This vulnerability can be particularly devastating in multi-user environments where contributors may have access to sensitive content or administrative functions, as it provides a pathway for privilege escalation or data manipulation that could go unnoticed for extended periods.
Mitigation strategies for CVE-2024-8720 must focus on immediate remediation through plugin updates to versions that address the sanitization and escaping issues, while also implementing additional security controls to limit the impact of potential exploitation. Administrators should ensure that all WordPress installations are updated to the latest plugin version that contains the necessary security patches, which typically include proper input validation and output escaping mechanisms that prevent malicious attributes from being processed without appropriate sanitization. Network-based mitigations such as web application firewalls can provide additional protection layers by filtering suspicious input patterns, though these should not be considered replacements for proper code-level fixes. Security monitoring should be enhanced to detect unusual activity patterns related to contributor accounts, particularly when these accounts are used to create or modify content that could contain malicious scripts. The ATT&CK framework categorizes this vulnerability under T1566 - Phishing and T1059 - Command and Scripting Interpreter, highlighting the potential for attackers to use the compromised environment for further malicious activities, including credential theft, data exfiltration, or establishing persistence within the WordPress installation. Regular security audits and input validation testing should be implemented to prevent similar vulnerabilities from emerging in other plugin components or custom WordPress developments.