CVE-2024-9674 in Debrandify Plugin
Summary
by MITRE • 10/18/2024
The Debrandify · Remove or Replace WordPress Branding plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.1.2 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 • 03/03/2025
The Debrandify plugin for WordPress presents a critical stored cross-site scripting vulnerability that affects all versions up to and including 1.1.2. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's SVG file upload functionality. The flaw specifically targets the handling of vector graphics files that users can upload through the WordPress administrative interface, creating a persistent security risk that can be exploited by attackers with minimal privileges.
The technical implementation of this vulnerability occurs when authenticated users with author-level permissions or higher upload SVG files to the WordPress installation. The plugin fails to properly sanitize the SVG content before storing it in the database, allowing malicious script code to be embedded within the file structure. When other users subsequently access pages containing these compromised SVG files, the stored scripts execute in their browsers, potentially leading to session hijacking, credential theft, or further exploitation of the compromised systems. This represents a classic stored XSS attack vector where malicious input becomes permanently embedded in the application's data storage.
The operational impact of this vulnerability extends beyond simple script execution, as it can facilitate more sophisticated attacks within the compromised WordPress environment. Attackers can leverage this vulnerability to manipulate user sessions, steal administrative credentials, or redirect users to malicious websites. The persistence of the vulnerability through stored data makes it particularly dangerous as it can affect multiple users over time without requiring repeated exploitation attempts. The low privilege requirement for exploitation means that even relatively low-privileged attackers can potentially compromise the entire WordPress installation.
This vulnerability maps directly to CWE-79, which describes cross-site scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through malicious file uploads. The weakness specifically manifests as a failure to properly escape output, creating conditions where user-supplied content can be executed as scripts. Organizations using the Debrandify plugin should immediately implement mitigations including plugin updates, input validation enforcement, and restricted file upload permissions. Additionally, administrators should monitor user upload activities and consider implementing web application firewalls to detect and block malicious SVG content before it can be stored in the system.
The security implications of this vulnerability highlight the critical importance of proper input validation and output escaping in web applications, particularly those handling user-generated content. WordPress plugin developers must implement comprehensive sanitization routines and ensure that all user-supplied data undergoes proper validation before being stored or rendered. The vulnerability serves as a reminder that even seemingly benign functionality like SVG file uploads can become attack vectors when proper security controls are not implemented, emphasizing the need for thorough security testing and code review processes in plugin development.