CVE-2024-9172 in Demo Importer Plus Plugin
Summary
by MITRE • 10/02/2024
The Demo Importer Plus plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 2.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-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 • 03/08/2025
The vulnerability identified as CVE-2024-9172 affects the Demo Importer Plus plugin for WordPress, a widely used tool for importing demo content and themes. This plugin has been found to contain a critical stored cross-site scripting vulnerability that impacts all versions up to and including 2.0.1. The flaw stems from inadequate input sanitization and output escaping mechanisms within the plugin's SVG file upload functionality. Security researchers have determined that this vulnerability can be exploited by authenticated attackers who possess at least Author-level permissions or higher within the WordPress environment, making it particularly concerning given the relatively low privilege requirements for exploitation.
The technical nature of this vulnerability resides in the plugin's failure to properly sanitize user-supplied SVG file content before storing and serving it to other users. When an attacker uploads a malicious SVG file, the plugin does not adequately validate or escape the content, allowing malicious script code to be embedded within the SVG structure. This stored payload remains persistent within the WordPress installation and executes whenever any user accesses the malicious SVG file through the website's frontend or backend interfaces. The vulnerability specifically targets the SVG file upload handler, which is commonly used for importing demonstration content, theme assets, and various media elements within WordPress environments. This type of vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications.
The operational impact of CVE-2024-9172 extends beyond simple script execution as it creates a persistent threat vector that can compromise user sessions and potentially enable further attacks. An attacker with Author-level access can inject malicious scripts that may steal user credentials, hijack sessions, or redirect users to malicious websites. The vulnerability is particularly dangerous because SVG files are commonly used for logos, icons, and other graphical elements in WordPress themes and plugins, making them frequently accessed by both administrators and regular site visitors. This creates multiple attack surfaces where the malicious code can be executed. From an attacker's perspective this vulnerability aligns with ATT&CK technique T1566.001 which involves the use of malicious files in phishing campaigns, and T1059.007 which covers script execution through web shells or malicious scripts in web applications.
Organizations using the Demo Importer Plus plugin should immediately implement multiple layers of mitigation strategies to protect their WordPress installations. The primary recommendation involves updating to the latest available version of the plugin where the vulnerability has been patched. Security teams should also implement strict file upload validation measures, including MIME type checking, file content verification, and size limitations for SVG uploads. Network-based intrusion detection systems should be configured to monitor for suspicious file upload activities and anomalous script execution patterns. Additionally, administrators should conduct regular security audits of plugin installations and ensure that user permissions are properly managed according to the principle of least privilege. The vulnerability demonstrates the importance of input validation and output escaping practices in web application security, reinforcing the need for comprehensive security testing of all user-supplied content handling mechanisms. Organizations should also consider implementing content security policies to prevent execution of unauthorized scripts, and maintain regular backups to ensure rapid recovery in case of successful exploitation attempts.