CVE-2026-22335 Overview
CVE-2026-22335 is a SQL Injection vulnerability affecting the WooCommerce Frontend Manager – Ultimate plugin for WordPress in versions prior to 6.7.7. The flaw allows authenticated users with subscriber-level privileges to inject malicious SQL statements into backend database queries. Because subscriber accounts are often available through open registration on WooCommerce-powered stores, the barrier to exploitation is low. The vulnerability maps to CWE-89: Improper Neutralization of Special Elements used in an SQL Command. Patchstack published the advisory and tracks the issue against plugin versions up to and including 6.7.6.
Critical Impact
Authenticated subscribers can extract sensitive database contents, including customer records, order data, and password hashes, from affected WooCommerce stores.
Affected Products
- WooCommerce Frontend Manager – Ultimate plugin for WordPress
- All versions up to and including 6.7.6
- WordPress sites running WooCommerce with the affected plugin enabled
Discovery Timeline
- 2026-06-17 - CVE-2026-22335 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-22335
Vulnerability Analysis
The vulnerability stems from improper neutralization of user-supplied input within SQL queries executed by the WooCommerce Frontend Manager – Ultimate plugin. An authenticated user holding the WordPress subscriber role can submit crafted parameters that are concatenated into a database query without adequate sanitization or parameterization. The injected SQL is then executed in the context of the WordPress database user, allowing the attacker to read arbitrary table contents. The scope is marked as changed, meaning the impact extends beyond the vulnerable component to data owned by other parts of the WordPress installation, including core tables such as wp_users and wp_usermeta.
Root Cause
The plugin builds SQL statements using string concatenation or insufficiently filtered input rather than using parameterized queries through $wpdb->prepare(). Input received from a subscriber-accessible endpoint reaches the query layer without strict type casting or whitelist validation. This is a textbook [CWE-89] flaw where the trust boundary between authenticated low-privilege users and the database is not enforced.
Attack Vector
Exploitation requires network access to the WordPress site and a valid subscriber account. The attacker authenticates, then issues a crafted request to a plugin endpoint exposed to subscribers. The malicious payload alters the structure of the underlying SQL query, typically using UNION SELECT or boolean-based blind techniques to exfiltrate data. No user interaction is required from administrators. Refer to the Patchstack Security Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-22335
Indicators of Compromise
- HTTP requests from authenticated subscriber sessions containing SQL metacharacters such as ', UNION, SELECT, SLEEP(, or -- in plugin parameters
- Unusually long response times on plugin endpoints, indicating time-based blind SQL injection probes
- Web server access logs showing repeated requests to WooCommerce Frontend Manager endpoints from a single low-privilege account
- Unexpected database errors logged by WordPress or MySQL referencing plugin-handled queries
Detection Strategies
- Inspect web application firewall (WAF) and reverse proxy logs for SQL injection signatures targeting /wp-admin/admin-ajax.php and plugin-specific routes
- Correlate authentication events for subscriber accounts with subsequent database error spikes
- Enable MySQL general or slow query logging temporarily to identify malformed or anomalous queries originating from the plugin
Monitoring Recommendations
- Alert on creation of new subscriber accounts followed by rapid plugin endpoint activity
- Monitor outbound network traffic for data exfiltration patterns from the WordPress host
- Track plugin file integrity and database query volume baselines to surface anomalies
How to Mitigate CVE-2026-22335
Immediate Actions Required
- Upgrade WooCommerce Frontend Manager – Ultimate to version 6.7.7 or later on all WordPress instances
- Audit existing subscriber accounts and remove or disable any that are unrecognized or inactive
- Rotate WordPress secret keys in wp-config.php and force password resets if exploitation is suspected
- Review database contents for unauthorized read activity against wp_users, wp_usermeta, and WooCommerce order tables
Patch Information
The vendor addressed the vulnerability in WooCommerce Frontend Manager – Ultimate version 6.7.7. Administrators should apply the update through the WordPress plugin manager or by deploying the patched release manually. Details are available in the Patchstack advisory.
Workarounds
- Disable the WooCommerce Frontend Manager – Ultimate plugin until the patched version can be deployed
- Temporarily close open user registration to prevent attackers from provisioning subscriber accounts
- Deploy WAF rules that block SQL injection patterns on plugin endpoints accessible to authenticated subscribers
- Restrict database privileges of the WordPress database user to the minimum required, removing rights such as FILE where present
# Configuration example: update the plugin via WP-CLI
wp plugin update wc-frontend-manager-ultimate --version=6.7.7
wp plugin status wc-frontend-manager-ultimate
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
