CVE-2026-27357: WP Search Analytics Auth Bypass Flaw

CVE-2026-27357 Overview

CVE-2026-27357 is a Missing Authorization vulnerability [CWE-862] in the Cornel Raiu WP Search Analytics plugin for WordPress. The flaw affects all versions before 1.5.0 and stems from incorrectly configured access control on plugin functionality. Unauthenticated attackers can reach protected functions over the network without user interaction. Successful exploitation leads to limited integrity impact but does not directly expose data or affect availability. The issue is tracked under the Patchstack vulnerability database and is categorized as Broken Access Control.

Critical Impact
Remote, unauthenticated attackers can invoke restricted plugin actions on WordPress sites running WP Search Analytics before version 1.5.0, enabling unauthorized modifications to plugin state.

Affected Products

Cornel Raiu WP Search Analytics plugin for WordPress
All versions prior to 1.5.0
WordPress sites with the vulnerable plugin installed and activated

Discovery Timeline

2026-05-25 - CVE-2026-27357 published to NVD
2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-27357

Vulnerability Analysis

The vulnerability is a Missing Authorization issue [CWE-862] in the WP Search Analytics WordPress plugin. The plugin exposes one or more action handlers that fail to verify whether the requesting user holds the required capability or role. As a result, an attacker can send crafted HTTP requests to plugin endpoints and trigger functionality that should be restricted to authenticated administrative users.

Because the attack vector is network-based and requires no privileges or user interaction, exploitation is straightforward against any internet-facing WordPress installation running a vulnerable version. The integrity impact is limited, suggesting an attacker can modify a constrained subset of plugin data such as stored search analytics, settings, or logged entries. Confidentiality and availability remain unaffected per the CVSS vector.

Root Cause

The root cause is an incorrectly configured access control security level on plugin action handlers. The plugin omits proper capability checks such as current_user_can() or fails to validate a nonce via check_admin_referer() or wp_verify_nonce() before executing privileged operations. This pattern is a recurring class of flaw in WordPress plugins that register AJAX or admin-post endpoints without enforcing authorization.

Attack Vector

An unauthenticated attacker sends HTTP requests to the WordPress site targeting the exposed plugin endpoints. Because no authentication, privileges, or user interaction are required, the attack can be automated and executed at scale against vulnerable WordPress sites discoverable through plugin fingerprinting. Refer to the Patchstack Vulnerability Advisory for technical details on the affected endpoints.

Detection Methods for CVE-2026-27357

Indicators of Compromise

Unauthenticated HTTP POST or GET requests to WP Search Analytics plugin endpoints under /wp-admin/admin-ajax.php or /wp-admin/admin-post.php with plugin-specific action parameters
Unexpected modifications to WP Search Analytics settings, log entries, or stored search data without a corresponding administrator login
Requests originating from non-administrative IP addresses targeting plugin action handlers

Detection Strategies

Inspect web server access logs for requests to plugin action endpoints from clients lacking a valid authenticated session cookie
Correlate WordPress audit logs with plugin state changes to identify modifications not tied to a logged-in administrator
Deploy a web application firewall rule matching known plugin action parameters from unauthenticated sources

Monitoring Recommendations

Enable verbose logging on the WordPress instance and forward logs to a centralized SIEM for correlation
Monitor the wp_options table and any plugin-specific database tables for unexpected writes
Track plugin version inventory across all managed WordPress sites and alert on installations running versions below 1.5.0

How to Mitigate CVE-2026-27357

Immediate Actions Required

Upgrade the WP Search Analytics plugin to version 1.5.0 or later on every affected WordPress site
If immediate upgrade is not possible, deactivate and remove the plugin until a patched version is deployed
Review WP Search Analytics data and configuration for unauthorized modifications and restore from backup if tampering is identified

Patch Information

The vendor addressed the issue in WP Search Analytics version 1.5.0. Site administrators should update through the WordPress plugin manager or download the patched release directly. Confirm the installed version after upgrade and verify that previously exposed endpoints now enforce capability and nonce checks. Consult the Patchstack Vulnerability Advisory for vendor-confirmed remediation details.

Workarounds

Restrict access to /wp-admin/admin-ajax.php and /wp-admin/admin-post.php at the web application firewall layer to filter unauthenticated requests targeting plugin actions
Apply IP allow-listing to the WordPress administrative interface to limit exposure to trusted networks
Disable the WP Search Analytics plugin until the upgrade to version 1.5.0 is completed

bash

# Update WP Search Analytics via WP-CLI
wp plugin update search-analytics --version=1.5.0
wp plugin list --name=search-analytics --fields=name,status,version