CVE-2025-3055 Overview
CVE-2025-3055 is an arbitrary file deletion vulnerability in the WP User Frontend Pro plugin for WordPress. The flaw exists in the delete_avatar_ajax() function, which fails to properly validate file paths before deletion. All plugin versions up to and including 4.1.3 are affected.
Authenticated attackers with Subscriber-level access or higher can exploit this issue to delete arbitrary files on the server. Deleting critical files such as wp-config.php can trigger WordPress reinstallation flows, leading to remote code execution. The vulnerability is classified under CWE-22 (Path Traversal).
Critical Impact
Subscriber-level attackers can delete wp-config.php and achieve full site takeover through forced reinstallation, resulting in remote code execution.
Affected Products
- WP User Frontend Pro plugin for WordPress
- All versions up to and including 4.1.3
- WordPress sites with Subscriber-level registration enabled
Discovery Timeline
- 2025-06-05 - CVE-2025-3055 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-3055
Vulnerability Analysis
The vulnerability resides in the delete_avatar_ajax() function of WP User Frontend Pro. The function processes user-supplied input identifying an avatar file but does not enforce that the target file lies within the expected uploads directory. An attacker can supply a relative or absolute path that traverses outside the avatar storage location.
Because the AJAX handler is accessible to any authenticated user with at least Subscriber privileges, the attack surface is wide on sites that allow open registration. The plugin executes the deletion using the WordPress filesystem APIs without sanitizing path separators or resolving canonical paths. This allows traversal sequences such as ../ to reach sensitive files outside the intended directory.
Deleting wp-config.php is the canonical escalation path. Once removed, WordPress enters its installation wizard on the next request, allowing an unauthenticated visitor to reconfigure the database connection to an attacker-controlled host and inject malicious administrative accounts or PHP payloads.
Root Cause
The root cause is insufficient input validation in the delete_avatar_ajax() handler. The function trusts client-supplied file path data and omits checks that would confirm the resolved path remains within the plugin's avatar directory. There is no use of realpath() comparison or allowlisting against expected file names.
Attack Vector
Exploitation requires network access to the WordPress site and a valid authenticated session at Subscriber privilege or above. The attacker sends a crafted AJAX request to the avatar deletion endpoint with a manipulated path parameter pointing at an arbitrary server file. No user interaction is needed beyond the authenticated request.
The vulnerability is described in prose only as no verified proof-of-concept code is publicly available. See the Wordfence Vulnerability Report for additional technical context.
Detection Methods for CVE-2025-3055
Indicators of Compromise
- Unexpected deletion of wp-config.php or other core PHP files in the WordPress root directory.
- WordPress installation wizard appearing on a previously configured site.
- AJAX requests to the wp-admin/admin-ajax.php endpoint with action=wpuf_delete_avatar containing path traversal sequences such as ../.
- New administrative user accounts created without corresponding administrator action.
Detection Strategies
- Monitor web server access logs for POST requests targeting admin-ajax.php with avatar-related actions from low-privilege user sessions.
- Inspect file integrity monitoring alerts for deletions of files outside the /wp-content/uploads/ directory tree.
- Correlate Subscriber-level authentication events with subsequent file system change events on the WordPress host.
Monitoring Recommendations
- Enable file integrity monitoring across the WordPress installation root and configuration files.
- Aggregate WordPress and web server logs into a centralized log platform for correlation and retention.
- Alert on any access to the WordPress installation wizard (/wp-admin/install.php) on production sites.
How to Mitigate CVE-2025-3055
Immediate Actions Required
- Update WP User Frontend Pro to a version newer than 4.1.3 as soon as the vendor patch is available.
- Audit all WordPress user accounts and remove unused Subscriber-level accounts created through open registration.
- Verify the integrity of wp-config.php and other core WordPress files against known-good backups.
- Restrict access to admin-ajax.php from untrusted networks using a web application firewall where feasible.
Patch Information
Review the Headway App Changelog for vendor patch releases addressing the delete_avatar_ajax() function. Apply the fixed plugin version through the WordPress admin dashboard or by replacing the plugin files manually.
Workarounds
- Disable open user registration in WordPress settings if not required for business operations.
- Deactivate the WP User Frontend Pro plugin until a patched version can be deployed.
- Deploy a web application firewall rule blocking AJAX requests containing ../ sequences in avatar-related parameters.
- Restrict file system permissions so that the web server user cannot delete wp-config.php outside of controlled maintenance windows.
# Configuration example: restrict wp-config.php permissions
chown root:www-data /var/www/html/wp-config.php
chmod 640 /var/www/html/wp-config.php
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
