CVE-2024-7703 in ARMember Plugin
Summary
by MITRE • 08/17/2024
The ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 4.0.37 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.
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Analysis
by VulDB Data Team • 03/14/2025
The ARMember WordPress plugin represents a critical security vulnerability classified as CVE-2024-7703, affecting versions up to and including 4.0.37. This vulnerability manifests as a stored cross-site scripting flaw that specifically targets SVG file upload functionality within the plugin's content restriction and membership management system. The flaw exists in the plugin's handling of user-uploaded SVG files, where inadequate input sanitization and output escaping mechanisms fail to properly validate or sanitize the uploaded content before it is stored and subsequently served to other users. The vulnerability's impact is particularly concerning because it requires only subscriber-level access or higher, making it exploitable by users who already have some level of authorization within the WordPress environment.
The technical implementation of this vulnerability stems from the plugin's insufficient validation of SVG file content, which allows attackers to embed malicious JavaScript code within SVG files that are then stored in the WordPress media library. When other users access pages containing these compromised SVG files, the embedded scripts execute in their browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. This stored XSS vulnerability operates through the principle that SVG files can contain executable JavaScript when embedded within HTML documents, and the plugin fails to strip or properly escape such content during the upload process. The flaw aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities resulting from insufficient input sanitization, and represents a direct violation of secure coding practices for file upload validation.
The operational impact of CVE-2024-7703 extends beyond simple script execution, as it provides attackers with a persistent vector for maintaining access to compromised WordPress installations. Once an attacker successfully uploads a malicious SVG file, the script will execute every time any user accesses the compromised content, creating a long-term threat that can persist even after the initial attack window. This vulnerability particularly affects membership-based websites where users frequently upload content, as it can be exploited to target other subscribers or administrators who may have elevated privileges. The attack surface is further expanded because SVG files are often used for logos, avatars, and other profile elements, making the exploitation vector more likely to succeed in real-world scenarios. Organizations using this plugin face potential data breaches, user account compromise, and reputational damage from successful exploitation attempts.
Mitigation strategies for CVE-2024-7703 must address both immediate remediation and long-term prevention measures. The most effective immediate solution involves updating to the latest version of the ARMember plugin where the vulnerability has been patched, as vendors typically implement proper input sanitization and output escaping mechanisms to prevent malicious content from being stored. Administrators should also implement additional security layers such as restricting user upload capabilities to only allow specific file types, implementing Content Security Policy headers to prevent script execution, and conducting regular security audits of uploaded files. Organizations should consider implementing file type validation at multiple levels, including server-side validation, MIME type checking, and content inspection to ensure that SVG files do not contain executable content. The vulnerability also highlights the importance of following ATT&CK framework principles for defensive measures, particularly in the context of privilege escalation and persistence mechanisms that attackers might employ through such file upload vulnerabilities. Regular security monitoring and user access reviews become essential to detect potential exploitation attempts and maintain overall system integrity.