CVE-2026-42386 Overview
CVE-2026-42386 is an unauthenticated SQL injection vulnerability affecting the Order Delivery Date for WooCommerce WordPress plugin in versions up to and including 4.5.1. The flaw allows remote attackers to inject arbitrary SQL statements into database queries without authentication or user interaction. The vulnerability is classified under [CWE-89] (Improper Neutralization of Special Elements used in an SQL Command).
Patchstack published the vulnerability advisory, and the issue was added to the National Vulnerability Database on June 15, 2026. The flaw carries network-based exploitability with low attack complexity and changed scope.
Critical Impact
Unauthenticated attackers can execute arbitrary SQL queries against the WordPress database, exposing customer order data, credentials, and potentially the entire database contents.
Affected Products
- Order Delivery Date for WooCommerce plugin versions ≤ 4.5.1
- WordPress sites running the affected plugin alongside WooCommerce
- E-commerce deployments using the plugin for delivery scheduling
Discovery Timeline
- 2026-06-15 - CVE-2026-42386 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-42386
Vulnerability Analysis
The vulnerability resides in the Order Delivery Date for WooCommerce plugin, which extends WooCommerce with delivery scheduling features. User-supplied input reaches an SQL query without proper sanitization or parameterization. An unauthenticated attacker can send crafted HTTP requests that alter the structure of backend SQL statements.
Because exploitation requires no privileges and no user interaction, any internet-facing WordPress site running a vulnerable plugin version is at risk. The CVSS scope is marked as changed, indicating that successful exploitation can affect resources beyond the vulnerable component, such as the broader WordPress database shared with WooCommerce and other plugins.
Root Cause
The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The plugin concatenates user-controlled values into SQL queries instead of using prepared statements through the WordPress $wpdb->prepare() API. Inputs reach the database layer without escaping, type casting, or whitelist validation.
Attack Vector
The attack vector is network-based and unauthenticated. An attacker sends an HTTP request to a vulnerable endpoint exposed by the plugin, embedding SQL payloads in parameters that the plugin passes directly to the database. Successful injection enables data extraction through UNION-based or boolean-based techniques, time-based blind extraction, and potentially write operations against the wp_users and wp_options tables.
No verified proof-of-concept code is publicly available. Refer to the Patchstack Vulnerability Report for technical specifics.
Detection Methods for CVE-2026-42386
Indicators of Compromise
- HTTP requests to Order Delivery Date plugin endpoints containing SQL metacharacters such as ', ", UNION SELECT, SLEEP(, or --
- Anomalous spikes in database query latency originating from the plugin's PHP handlers
- Unexpected new administrative accounts in wp_users or modified wp_options rows
- Outbound traffic from the web server to attacker-controlled hosts following suspicious POST or GET requests
Detection Strategies
- Inspect web server access logs for parameter values containing SQL syntax targeted at plugin AJAX or REST endpoints
- Enable MySQL general query logging temporarily to identify malformed or injected queries originating from the plugin
- Deploy a Web Application Firewall (WAF) ruleset that flags SQL injection patterns in WooCommerce plugin URIs
Monitoring Recommendations
- Alert on repeated 4xx or 5xx responses from the plugin endpoints, which often indicate injection probing
- Monitor for changes to WordPress administrator accounts, user roles, and option values
- Forward WordPress, PHP, and MySQL logs to a centralized analytics platform for correlation across the stack
How to Mitigate CVE-2026-42386
Immediate Actions Required
- Update the Order Delivery Date for WooCommerce plugin to a version newer than 4.5.1 as soon as a fixed release is available from the vendor
- If no patched version is available, deactivate and remove the plugin until a fix is released
- Audit wp_users, wp_usermeta, and wp_options for unauthorized modifications and rotate all administrator credentials
- Restrict access to /wp-admin and plugin endpoints by IP allowlist where operationally feasible
Patch Information
Consult the Patchstack Vulnerability Report for vendor remediation guidance. Apply the fixed plugin version published by the maintainer through the WordPress plugin repository once available.
Workarounds
- Deploy a WAF rule blocking SQL injection signatures on requests targeting Order Delivery Date plugin paths
- Disable the plugin entirely through wp-cli until remediation is verified
- Enforce least privilege on the WordPress database user, removing FILE, DROP, and ALTER privileges where not required
# Configuration example
wp plugin deactivate order-delivery-date-for-woocommerce
wp plugin delete order-delivery-date-for-woocommerce
# Verify removal
wp plugin list --status=active | grep -i delivery
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
