CVE-2026-42745: Clover Smart Online Order Auth Bypass

CVE-2026-42745 Overview

CVE-2026-42745 is an authentication bypass vulnerability in the ZAYTECH Smart Online Order for Clover WordPress plugin (clover-online-orders). The flaw is classified under [CWE-288] Authentication Bypass Using an Alternate Path or Channel. Affected versions include all releases up to and including 1.6.0. An unauthenticated remote attacker can reach functionality that should require valid credentials by using an alternative request path. The vulnerability impacts confidentiality, integrity, and availability of the WordPress site running the plugin.

Critical Impact

Unauthenticated attackers can bypass authentication over the network without user interaction, gaining access to restricted plugin functionality on affected WordPress sites.

Affected Products

• ZAYTECH Smart Online Order for Clover (clover-online-orders) WordPress plugin
• All plugin versions from initial release through 1.6.0
• WordPress sites running the vulnerable plugin with public-facing endpoints

Discovery Timeline

• 2026-05-27 - CVE-2026-42745 published to NVD
• 2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-42745

Vulnerability Analysis

The Smart Online Order for Clover plugin exposes functionality through an alternate path that fails to enforce authentication. Attackers can reach privileged operations by routing requests through this unprotected channel. Because the plugin handles order data tied to Clover point-of-sale integrations, bypassing authentication can expose customer order details and configuration controls.

The attack requires network access only, with low complexity and no privileges. No user interaction is needed to trigger the bypass. Confidentiality, integrity, and availability are each impacted at a limited scope, consistent with access to plugin-managed data rather than full WordPress administrative control.

The Exploit Prediction Scoring System rates this issue with a low near-term exploitation probability, but the absence of authentication and network reachability make opportunistic scanning realistic once exploitation details circulate.

Root Cause

The root cause is improper authentication enforcement on at least one plugin entry point. Under [CWE-288], the application provides multiple paths to the same functionality, but one path skips the credential check. The plugin trusts requests reaching this alternate path without validating the session, capability, or nonce.

Attack Vector

An attacker sends HTTP requests directly to the unprotected plugin endpoint exposed by WordPress. No authentication header, cookie, or nonce is required for the alternate path to process the request. The vulnerability manifests in the plugin's request routing logic where authentication checks are missing on a secondary handler. See the Patchstack Vulnerability Report for technical specifics.

Detection Methods for CVE-2026-42745

Indicators of Compromise

• Unauthenticated HTTP requests to clover-online-orders plugin endpoints under /wp-content/plugins/clover-online-orders/ or related AJAX/REST routes
• Unexpected modifications to plugin configuration, order records, or Clover integration settings
• Spikes in admin-ajax.php or REST API traffic referencing the plugin without authenticated session cookies

Detection Strategies

• Review WordPress access logs for requests to plugin-specific actions originating from external IPs lacking a wordpress_logged_in_* cookie
• Enable WordPress audit logging to record changes to plugin settings and order data
• Compare plugin file integrity against the vendor distribution to identify tampering

Monitoring Recommendations

• Alert on anomalous request volume to /wp-admin/admin-ajax.php with action parameters tied to the plugin
• Forward web server and WordPress audit logs to a central platform for correlation
• Track new administrative or order-modification events occurring outside normal business hours

How to Mitigate CVE-2026-42745

Immediate Actions Required

• Update the Smart Online Order for Clover plugin to a version later than 1.6.0 once a patched release is available from ZAYTECH
• Deactivate and remove the plugin if a patched version is not yet published and the functionality is not business-critical
• Restrict access to WordPress administrative and AJAX endpoints using a web application firewall rule that requires authenticated sessions

Patch Information

At the time of NVD publication on 2026-05-27, the vulnerability affects versions up to and including 1.6.0. Administrators should monitor the Patchstack Vulnerability Report and the official WordPress plugin repository for an updated release that enforces authentication on all plugin entry points.

Workarounds

• Block external access to plugin endpoints at the web server or WAF layer until a patch is applied
• Limit access to the WordPress site by IP allowlist for administrative and order-management traffic
• Disable the plugin temporarily and process orders through an alternative channel if no patch is available

# Example nginx rule to block unauthenticated access to the plugin endpoints
location ~* /wp-content/plugins/clover-online-orders/ {
    deny all;
    return 403;
}