CVE-2026-56061 Overview
CVE-2026-56061 is an unauthenticated broken access control vulnerability affecting the Subscriptions for WooCommerce WordPress plugin in versions up to and including 1.9.5. The flaw stems from missing authorization checks [CWE-862], allowing remote attackers to invoke privileged plugin functions without providing credentials. Successful exploitation can modify subscription data and impact the integrity of WooCommerce store operations. The vulnerability is exploitable over the network with low attack complexity and no user interaction. No public exploit is currently known.
Critical Impact
Unauthenticated attackers can send crafted HTTP requests to trigger protected functionality in the Subscriptions for WooCommerce plugin, resulting in high integrity impact on affected WordPress stores.
Affected Products
- Subscriptions for WooCommerce plugin for WordPress
- Versions <= 1.9.5
- WordPress sites running WooCommerce with the affected plugin enabled
Discovery Timeline
- 2026-06-26 - CVE-2026-56061 published to NVD
- 2026-06-29 - Last updated in NVD database
Technical Details for CVE-2026-56061
Vulnerability Analysis
CVE-2026-56061 is classified as Broken Access Control under [CWE-862] Missing Authorization. The Subscriptions for WooCommerce plugin exposes functionality that should be restricted to authenticated administrators or store managers. In versions up to 1.9.5, one or more of these code paths fail to verify the caller's identity or capability before executing. This design flaw enables unauthenticated network requests to reach protected logic.
Because WooCommerce plugins commonly register admin-ajax.php actions, REST API routes, or admin_post handlers, a missing current_user_can() capability check or nonce validation on any such handler exposes it to the public. The CVSS integrity impact is High while confidentiality and availability remain unaffected, indicating that the vulnerable endpoint primarily allows unauthorized state changes rather than data exfiltration or service disruption.
Root Cause
The root cause is the absence of authorization enforcement in one or more plugin request handlers. Callback functions execute their intended actions without validating that the requester holds the required WordPress capability. Authentication and nonce checks are either missing or improperly implemented, permitting anonymous access to functionality intended for privileged users.
Attack Vector
An attacker sends crafted HTTP POST or GET requests directly to the vulnerable plugin endpoint on a target WordPress site. No credentials, session cookies, or CSRF tokens are required. The attack requires only network reachability to the site and knowledge of the vulnerable action name or REST route. Refer to the Patchstack Vulnerability Report for endpoint-level details.
Detection Methods for CVE-2026-56061
Indicators of Compromise
- Unauthenticated POST or GET requests to admin-ajax.php referencing Subscriptions for WooCommerce action names
- Unexpected modifications to subscription records, product metadata, or plugin configuration values in the WordPress database
- Access log entries showing plugin REST API routes accessed without a valid X-WP-Nonce header or authenticated session
Detection Strategies
- Inventory WordPress sites and confirm the installed version of the Subscriptions for WooCommerce plugin
- Review web server access logs for anonymous requests targeting plugin action handlers and REST endpoints
- Compare current subscription and WooCommerce configuration state against known-good backups to identify unauthorized changes
Monitoring Recommendations
- Enable WordPress audit logging to capture plugin setting changes and subscription updates
- Alert on high volumes of admin-ajax.php requests from a single source IP without authentication cookies
- Forward WordPress and web server logs to a centralized SIEM for correlation and retention
How to Mitigate CVE-2026-56061
Immediate Actions Required
- Identify all WordPress installations running Subscriptions for WooCommerce at version 1.9.5 or earlier
- Update the plugin to a fixed release as published by the vendor and referenced in the Patchstack advisory
- Audit subscription and store data for unauthorized modifications since the plugin was deployed
Patch Information
Refer to the Patchstack Vulnerability Report for the fixed version. Apply the update through the WordPress admin dashboard or via WP-CLI. Verify the installed version after upgrade and confirm the site loads without errors.
Workarounds
- Deactivate the Subscriptions for WooCommerce plugin until the patched version can be installed
- Restrict access to /wp-admin/admin-ajax.php and WordPress REST API routes at the web application firewall (WAF) for unauthenticated sources where feasible
- Apply virtual patching rules at the WAF to block requests targeting the vulnerable plugin actions
# Configuration example: verify installed plugin version via WP-CLI
wp plugin get subscriptions-for-woocommerce --field=version
wp plugin update subscriptions-for-woocommerce
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
