CVE-2025-3914: Aeropage Sync For Airtable RCE Flaw

CVE-2025-3914 Overview

The Aeropage Sync for Airtable plugin for WordPress contains an arbitrary file upload vulnerability due to missing file type validation in the aeropage_media_downloader function. This security flaw affects all versions up to and including 3.2.0, allowing authenticated attackers with Subscriber-level access or higher to upload arbitrary files to the affected WordPress site's server, potentially leading to remote code execution.

Critical Impact

Authenticated attackers with minimal privileges (Subscriber-level) can upload malicious files including PHP web shells, enabling complete server compromise and remote code execution.

Affected Products

• Aeropage Sync for Airtable plugin for WordPress versions up to and including 3.2.0
• WordPress installations using vulnerable versions of the Aeropage Sync for Airtable plugin
• All WordPress sites with the aeropage_sync_for_airtable plugin installed prior to patching

Discovery Timeline

• 2025-04-26 - CVE-2025-3914 published to NVD
• 2025-05-06 - Last updated in NVD database

Technical Details for CVE-2025-3914

Vulnerability Analysis

This arbitrary file upload vulnerability (CWE-434) exists within the aeropage_media_downloader function of the Aeropage Sync for Airtable WordPress plugin. The function fails to implement proper file type validation when processing media downloads, creating a dangerous attack surface. Because WordPress Subscriber accounts are easily obtained on most WordPress installations, this vulnerability significantly lowers the barrier to exploitation.

The absence of file extension and MIME type checks allows attackers to bypass intended restrictions and upload executable files such as PHP scripts. Once a malicious file is uploaded to the server, an attacker can directly access it via the web server to achieve remote code execution with the privileges of the web server process.

Root Cause

The root cause of CVE-2025-3914 is the complete absence of file type validation within the aeropage_media_downloader function. The vulnerable code, located around line 1214-1250 in aeropage.php, processes file downloads without verifying that uploaded files conform to an allowlist of safe file types. This violates the principle of defense in depth and allows arbitrary file content to be written to the WordPress uploads directory.

Attack Vector

The attack vector for this vulnerability is network-based, requiring only low-privilege authentication (Subscriber-level access). An attacker can exploit this vulnerability through the following general approach:

1. Obtain or register a WordPress Subscriber account on the target site
2. Craft a malicious request to the aeropage_media_downloader function
3. Upload a PHP web shell or other malicious executable file
4. Access the uploaded file directly via the web server to execute arbitrary code

The vulnerability requires no user interaction and can be exploited remotely. Technical details regarding the specific vulnerable code paths can be found in the WordPress Plugin Repository and the Wordfence vulnerability report.

Detection Methods for CVE-2025-3914

Indicators of Compromise

• Unexpected PHP files or executable scripts in the WordPress wp-content/uploads directory
• Web server access logs showing requests to unusual file paths within the uploads directory
• New or modified files with suspicious extensions (.php, .phtml, .phar) in media folders
• Unexpected outbound connections from the web server indicative of reverse shell activity

Detection Strategies

• Monitor WordPress uploads directories for files with executable extensions (.php, .phtml, .phar, etc.)
• Implement file integrity monitoring on WordPress installations to detect unauthorized file additions
• Review web server access logs for suspicious POST requests to Aeropage plugin endpoints
• Deploy web application firewall (WAF) rules to block file upload attempts with dangerous extensions

Monitoring Recommendations

• Enable detailed logging for WordPress plugin activities and file system changes
• Configure alerts for new file creations in the wp-content/uploads directory with non-media extensions
• Implement real-time file system monitoring using SentinelOne Singularity Platform
• Regularly audit user accounts with Subscriber-level access or higher for unauthorized registrations

How to Mitigate CVE-2025-3914

Immediate Actions Required

• Update the Aeropage Sync for Airtable plugin to a version newer than 3.2.0 immediately
• Audit the WordPress uploads directory for any suspicious or unauthorized files
• Review and remove unnecessary Subscriber-level user accounts
• Implement file upload restrictions at the web server level as an additional defense layer

Patch Information

A security patch addressing this vulnerability has been released by the vendor. The fix implements proper file type validation in the aeropage_media_downloader function. The patch details can be reviewed in the WordPress Plugin Changeset 3281904. WordPress administrators should update to the latest available version of the plugin through the WordPress admin dashboard or by downloading directly from the WordPress Plugin Repository.

Workarounds

• Temporarily disable the Aeropage Sync for Airtable plugin until patching is possible
• Restrict user registration on WordPress sites to prevent new Subscriber account creation
• Configure .htaccess rules to prevent PHP execution in the uploads directory
• Implement a Web Application Firewall (WAF) with rules blocking suspicious file upload patterns

# Apache .htaccess configuration to prevent PHP execution in uploads
# Place this file in wp-content/uploads/.htaccess

<FilesMatch "\.(?:php|phtml|phar|php3|php4|php5|php7|phps)$">
    Order Allow,Deny
    Deny from all
</FilesMatch>

# Alternative: Disable all script handlers in uploads directory
<IfModule mod_php.c>
    php_flag engine off
</IfModule>