CVE-2024-5020 in WPC Smart Quick View for WooCommerce Plugin
Summary
by MITRE • 12/04/2024
Multiple plugins for WordPress are vulnerable to Stored Cross-Site Scripting via the plugin's bundled FancyBox JavaScript library (versions 1.3.4 to 3.5.7) in various versions 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 • 02/22/2025
The vulnerability identified as CVE-2024-5020 represents a critical stored cross-site scripting flaw affecting multiple WordPress plugins that utilize the FancyBox JavaScript library. This security weakness exists within versions 1.3.4 through 3.5.7 of the library, creating a persistent threat vector that can be exploited by attackers with contributor-level privileges or higher. The vulnerability stems from inadequate input sanitization and output escaping mechanisms that fail to properly validate user-supplied attributes before processing them within the plugin's functionality.
The technical implementation of this flaw allows authenticated attackers to inject malicious JavaScript code into plugin configurations or content areas where the FancyBox library is utilized. When users access pages containing these malicious payloads, the injected scripts execute in the context of the victim's browser session, potentially leading to session hijacking, data exfiltration, or further compromise of the affected WordPress installation. The stored nature of this vulnerability means that the malicious code persists on the server and affects all users who view the compromised pages, unlike reflected XSS attacks that require specific user interaction with malicious links.
From an operational perspective, this vulnerability poses significant risks to WordPress sites that rely on affected plugins for media display, gallery functionality, or other user interface elements that incorporate the FancyBox library. The impact extends beyond simple script execution as attackers can leverage this vector to perform privilege escalation, steal administrator credentials, or establish persistent backdoors within the compromised environment. The contributor-level access requirement suggests that this vulnerability could be exploited through compromised user accounts or social engineering attacks that gain access to lower-privilege accounts within the WordPress ecosystem.
Security professionals should note that this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. The ATT&CK framework categorizes this as a web application attack vector under the technique of code injection, potentially enabling further exploitation through techniques such as credential theft or lateral movement within the compromised environment. Organizations should prioritize immediate remediation by updating affected plugins to versions that either patch the FancyBox library or implement proper input validation and output escaping measures.
Mitigation strategies should include immediate patching of all affected WordPress plugins, implementation of web application firewalls to detect and block suspicious script injection attempts, and regular security audits of plugin installations to identify potentially vulnerable components. Additionally, administrators should enforce strict input validation policies and consider implementing content security policies to limit the execution of unauthorized scripts within the WordPress environment. The vulnerability demonstrates the critical importance of maintaining up-to-date third-party libraries and the potential risks associated with bundled JavaScript components that may not receive timely security updates from plugin developers.