CVE-2025-4578: Dimdavid File Provider SQLi Vulnerability

CVE-2025-4578 Overview

CVE-2025-4578 is a critical SQL Injection vulnerability affecting the File Provider WordPress plugin through version 1.2.3. The vulnerability exists because the plugin does not properly sanitize and escape a parameter before using it in a SQL statement via an AJAX action that is accessible to unauthenticated users. This allows remote attackers to execute arbitrary SQL queries against the WordPress database without requiring authentication.

Critical Impact
Unauthenticated remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database contents, or potentially compromise the entire WordPress installation.

Affected Products

dimdavid File Provider WordPress plugin version 1.2.3 and earlier
WordPress installations using the vulnerable File Provider plugin
Any site exposing the vulnerable AJAX endpoint to unauthenticated users

Discovery Timeline

June 4, 2025 - CVE-2025-4578 published to NVD
June 4, 2025 - Last updated in NVD database

Technical Details for CVE-2025-4578

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) stems from improper input validation in the File Provider WordPress plugin. The plugin exposes an AJAX action that can be accessed without authentication, and a user-controlled parameter is incorporated directly into a SQL query without adequate sanitization or parameterization.

When exploited, attackers can manipulate the SQL query structure to perform unauthorized database operations. Since the vulnerability requires no authentication and can be exploited remotely over the network, it poses a significant risk to affected WordPress installations. Successful exploitation could result in complete compromise of database confidentiality, integrity, and availability.

Root Cause

The root cause of this vulnerability is insufficient input sanitization of user-supplied data before it is incorporated into SQL queries. The plugin fails to implement proper prepared statements or parameterized queries when handling AJAX requests, allowing malicious SQL syntax to be injected through the vulnerable parameter. This is a common vulnerability pattern in WordPress plugins where developers concatenate user input directly into database queries instead of using the WordPress $wpdb->prepare() function or similar protection mechanisms.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can craft a malicious HTTP request to the WordPress AJAX endpoint (admin-ajax.php) with a specially crafted parameter value containing SQL injection payload. The vulnerable AJAX action processes this input without proper validation, executing the attacker's SQL commands against the WordPress database.

The exploitation process typically involves:

Identifying WordPress sites running the vulnerable File Provider plugin
Crafting a malicious AJAX request with SQL injection payload in the vulnerable parameter
Sending the request to the target's wp-admin/admin-ajax.php endpoint with the vulnerable action
Extracting data through UNION-based, blind, or error-based SQL injection techniques

For detailed technical information about this vulnerability, refer to the WPScan Vulnerability Report.

Detection Methods for CVE-2025-4578

Indicators of Compromise

Unusual or unexpected queries to admin-ajax.php with suspicious parameter values containing SQL syntax such as UNION SELECT, 'OR'1'='1, or encoded variants
Database query logs showing malformed or unauthorized SQL statements
Evidence of data exfiltration or unauthorized database modifications
Web server access logs containing suspicious AJAX requests to the File Provider plugin actions

Detection Strategies

Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting WordPress AJAX endpoints
Implement real-time log analysis to identify patterns consistent with SQL injection attempts against admin-ajax.php
Use WordPress security plugins capable of detecting and alerting on suspicious AJAX activity
Monitor for unusual outbound data transfers that could indicate data exfiltration following successful exploitation

Monitoring Recommendations

Enable detailed database query logging to capture and analyze queries executed by the File Provider plugin
Configure alerts for anomalous AJAX request patterns, particularly those with unusually long parameter values or SQL-like syntax
Perform regular security audits of installed WordPress plugins and verify they are updated to secure versions
Monitor WordPress user account changes and database modifications for signs of post-exploitation activity

How to Mitigate CVE-2025-4578

Immediate Actions Required

Immediately deactivate and remove the File Provider plugin from all WordPress installations until a patched version is available
Review database logs and web server access logs for evidence of exploitation attempts
If compromise is suspected, perform a full database backup and audit for unauthorized changes
Consider implementing additional WAF rules to block SQL injection attempts against WordPress AJAX endpoints

Patch Information

At the time of publication, no official patch has been released by the vendor. WordPress administrators should monitor the WPScan Vulnerability Report for updates regarding a security fix. Until a patch is available, the recommended mitigation is to completely remove the vulnerable plugin.

Workarounds

Disable or uninstall the File Provider plugin entirely until a secure version is released
Implement WAF rules to filter and block requests containing SQL injection patterns targeting the vulnerable AJAX action
Restrict access to admin-ajax.php for unauthenticated users if the functionality is not required
Use a WordPress security plugin to add additional input validation and SQL injection protection at the application layer

bash

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate file-provider --path=/var/www/html/wordpress

# Alternatively, remove the plugin entirely
wp plugin uninstall file-provider --path=/var/www/html/wordpress

# Check for any remaining plugin files
find /var/www/html/wordpress/wp-content/plugins -name "*file-provider*" -type d