CVE-2025-9487 in Admin and Site Enhancements Plugin
Summary
by MITRE • 09/22/2025
The Admin and Site Enhancements (ASE) WordPress plugin before 7.9.8 does not sanitise SVG files when uploaded via xmlrpc.php when such uploads are enabled, which could allow users to upload a malicious SVG containing XSS payloads
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Analysis
by VulDB Data Team • 09/22/2025
The vulnerability identified as CVE-2025-9487 affects the Admin and Site Enhancements WordPress plugin version 7.9.7 and earlier, presenting a significant security risk through improper input validation during file upload processes. This flaw specifically manifests when SVG files are uploaded through the xmlrpc.php endpoint, which serves as a legacy API interface for WordPress communications. The issue stems from inadequate sanitisation of SVG content, creating a pathway for malicious actors to bypass standard security measures that typically protect against cross-site scripting attacks.
The technical flaw resides in the plugin's failure to properly validate and sanitize SVG file contents before storing them within the WordPress environment. When users with appropriate privileges upload SVG files through the xmlrpc.php interface, the system does not perform comprehensive checks to ensure that the uploaded files do not contain embedded malicious JavaScript code or other harmful payloads. This vulnerability operates under CWE-1237, which addresses the improper neutralization of special elements used in an XML document, specifically targeting the lack of proper SVG sanitization. The absence of input validation creates an environment where attackers can embed malicious code within SVG files that will execute when the files are rendered or displayed within the WordPress admin interface.
The operational impact of this vulnerability extends beyond simple XSS attacks, as it provides attackers with potential access to administrative functions within the WordPress environment. When malicious SVG files containing embedded scripts are uploaded, they can execute in the context of an authenticated user's browser session, potentially allowing attackers to escalate privileges, modify content, or extract sensitive information from the administrative interface. This vulnerability aligns with ATT&CK technique T1566.001, which covers the use of malicious files for initial access, and T1071.004, which addresses protocol tunneling through XMLRPC interfaces. The exploitation of this vulnerability could lead to complete compromise of the WordPress installation, particularly if the uploading user has administrative privileges.
Mitigation strategies for CVE-2025-9487 require immediate action to update the Admin and Site Enhancements plugin to version 7.9.8 or later, which contains the necessary sanitization fixes. Organizations should also implement additional security measures including disabling xmlrpc.php access when not required, implementing proper file type validation at the server level, and conducting regular security audits of uploaded content. Network administrators should monitor for suspicious xmlrpc.php activity and consider implementing web application firewalls to detect and block malicious SVG uploads. The vulnerability demonstrates the importance of proper input sanitization in web applications and highlights the need for comprehensive security testing of file upload functionality, particularly in legacy interfaces such as xmlrpc.php that remain active in many WordPress installations.