CVE-2025-54679: Neon Channel Customizer Auth Bypass Flaw

CVE-2025-54679 Overview

CVE-2025-54679 is a missing authorization vulnerability in the vertim Neon Channel Product Customizer Free WordPress plugin. The flaw affects all versions up to and including 2.0. An unauthenticated remote attacker can exploit incorrectly configured access control on plugin endpoints to trigger arbitrary content deletion. The vulnerability is classified under [CWE-862] (Missing Authorization) and primarily impacts availability of WordPress site content. No user interaction is required, and the attack vector is network-based with low complexity.

Critical Impact

Unauthenticated attackers can delete arbitrary content from affected WordPress sites, causing high availability impact.

Affected Products

• vertim Neon Channel Product Customizer Free plugin for WordPress
• All versions from n/a through 2.0
• WordPress sites with the neon-channel-product-customizer-free plugin installed and active

Discovery Timeline

• 2025-08-14 - CVE-2025-54679 published to the National Vulnerability Database
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-54679

Vulnerability Analysis

The Neon Channel Product Customizer Free plugin exposes one or more action handlers that perform destructive operations without verifying the caller's authorization. According to the Patchstack advisory, the issue results in arbitrary content deletion. Because authorization checks are missing, any unauthenticated visitor can invoke the vulnerable endpoint and remove site content.

The vulnerability falls under the broader category of broken access control. WordPress plugin actions typically rely on current_user_can() capability checks and nonce validation through check_ajax_referer() or wp_verify_nonce(). When these checks are absent, action handlers registered through admin-ajax.php or REST routes become callable by anonymous users.

Root Cause

The root cause is the absence of capability and nonce verification on a plugin action that modifies or deletes content. The plugin registers its handler without restricting it to authorized roles such as administrators or shop managers. As a result, the handler executes deletion logic regardless of who initiates the request.

Attack Vector

An attacker sends a crafted HTTP request to the WordPress installation targeting the vulnerable plugin action. The request can be directed at wp-admin/admin-ajax.php with the appropriate action parameter, or at a custom REST endpoint registered by the plugin. Because no authentication or authorization is enforced, the server processes the deletion request and removes the targeted content. Successful exploitation degrades site availability and may require restoration from backup.

No verified proof-of-concept code is publicly available. Technical details are documented in the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-54679

Indicators of Compromise

• Unexpected POST requests to /wp-admin/admin-ajax.php referencing plugin actions from the neon-channel-product-customizer-free plugin
• Missing posts, pages, products, or custom post types with no corresponding administrator activity in WordPress audit logs
• Anonymous or unauthenticated source IPs generating high volumes of requests to plugin-specific endpoints

Detection Strategies

• Inventory WordPress installations and identify any deployment of the neon-channel-product-customizer-free plugin at version 2.0 or earlier
• Inspect web server access logs for requests targeting plugin AJAX or REST endpoints originating from non-authenticated sessions
• Compare current content inventory against recent backups to identify unauthorized deletions

Monitoring Recommendations

• Enable WordPress audit logging to capture content deletion events with user attribution
• Forward web server and WordPress application logs to a centralized SIEM for correlation and alerting
• Configure alerts for spikes in deletion operations or for admin-ajax.php requests lacking valid session cookies

How to Mitigate CVE-2025-54679

Immediate Actions Required

• Deactivate and remove the Neon Channel Product Customizer Free plugin until a patched version is published by the vendor
• Restrict access to /wp-admin/admin-ajax.php at the web application firewall (WAF) level for unauthenticated requests targeting plugin actions
• Restore any deleted content from verified backups and validate site integrity

Patch Information

At the time of NVD publication, no fixed version is listed in the Patchstack WordPress Vulnerability Report. Administrators should monitor the vendor's plugin page on the WordPress plugin repository for an update beyond version 2.0 and apply it immediately when available.

Workarounds

• Remove the plugin entirely from production WordPress installations until a fixed release is available
• Deploy WAF rules that block unauthenticated POST requests carrying plugin-specific action parameters
• Enforce least-privilege access on WordPress roles and ensure regular, tested backups are in place to recover from content loss