CVE-2026-48883: WPC Product Bundles Auth Bypass Flaw

CVE-2026-48883 Overview

CVE-2026-48883 is a broken access control vulnerability in the WPC Product Bundles for WooCommerce plugin for WordPress. The flaw affects all versions up to and including 8.5.3. Unauthenticated attackers can reach plugin functionality that should be restricted to authorized users, enabling unauthorized state changes against WooCommerce stores. The weakness is tracked under [CWE-862] Missing Authorization.

The vulnerability is network-exploitable, requires no privileges, and needs no user interaction. Successful exploitation impacts the integrity of WooCommerce data managed by the plugin.

Critical Impact
Unauthenticated remote attackers can invoke protected plugin actions over HTTP, modifying WooCommerce product bundle data without any credentials.

Affected Products

WPC Product Bundles for WooCommerce plugin versions <= 8.5.3
WordPress sites running WooCommerce with the affected plugin installed
E-commerce deployments exposing the plugin's AJAX or REST endpoints to the internet

Discovery Timeline

2026-06-15 - CVE-2026-48883 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-48883

Vulnerability Analysis

The vulnerability stems from missing authorization checks in the WPC Product Bundles for WooCommerce plugin. One or more plugin handlers process requests without verifying the caller's capability or nonce. An unauthenticated attacker can call these handlers directly and trigger actions that should be restricted to administrators or shop managers.

The issue maps to [CWE-862] Missing Authorization. The CVSS vector indicates a network attack path with no authentication and no user interaction, and the impact is limited to integrity. Attackers cannot directly read confidential data or crash the site through this flaw, but they can alter plugin-managed state on the target store.

The EPSS score is 0.238% with a percentile of 14.651, indicating low observed exploitation activity at publication. The plugin's wide deployment across WooCommerce stores still makes the issue worth treating as a priority for affected operators.

Root Cause

The root cause is the absence of capability verification (current_user_can()) and nonce validation (check_ajax_referer() or wp_verify_nonce()) on sensitive plugin endpoints. Without these checks, WordPress treats anonymous HTTP requests as legitimate and executes the handler logic.

Attack Vector

An attacker sends crafted HTTP requests to the plugin's exposed action endpoints, typically admin-ajax.php actions or REST routes registered by the plugin. Because authorization is not enforced, the request executes with the privileges intended for store administrators. Refer to the Patchstack Vulnerability Report for the disclosed handler details.

No public proof-of-concept exploit code is referenced in the available data, so technical details are described in prose only.

Detection Methods for CVE-2026-48883

Indicators of Compromise

Unauthenticated POST requests to /wp-admin/admin-ajax.php referencing WPC Product Bundles plugin actions
Unexpected modifications to product bundle configurations, pricing, or bundled item lists in WooCommerce
Access log entries showing repeated requests to plugin REST routes from a single IP without prior authentication cookies

Detection Strategies

Inventory WordPress installations and flag any host with WPC Product Bundles for WooCommerce at version <= 8.5.3
Inspect WooCommerce audit logs and database revision tables for unauthorized changes to bundle products
Correlate web server access logs against authentication logs to identify state-changing requests issued without a logged-in session

Monitoring Recommendations

Enable a Web Application Firewall (WAF) rule set that logs and blocks unauthenticated calls to plugin AJAX actions
Monitor WordPress option and post meta tables for unexpected writes against bundle products
Alert on outbound HTTP requests or admin user creations occurring shortly after suspicious plugin endpoint access

How to Mitigate CVE-2026-48883

Immediate Actions Required

Update WPC Product Bundles for WooCommerce to a version newer than 8.5.3 as soon as the vendor releases a patched build
Restrict access to /wp-admin/ and admin-ajax.php via IP allowlisting where feasible
Audit recent changes to WooCommerce product bundles and revert any unauthorized modifications

Patch Information

Review the Patchstack Vulnerability Report for the fixed version reference and apply the plugin update through the WordPress admin dashboard or WP-CLI.

Workarounds

Disable the WPC Product Bundles for WooCommerce plugin until a patched version is installed
Deploy virtual patching rules at the WAF layer to block unauthenticated requests to the vulnerable plugin actions
Enforce strong authentication on all administrative WordPress accounts and rotate any credentials suspected of exposure

bash

# Update the plugin using WP-CLI once a fixed version is available
wp plugin update woo-product-bundle --path=/var/www/html

# Or temporarily deactivate the vulnerable plugin
wp plugin deactivate woo-product-bundle --path=/var/www/html