CVE-2026-25318: WiserReview Authorization Bypass Flaw

CVE-2026-25318 Overview

CVE-2026-25318 is a Missing Authorization vulnerability affecting the WiserReview Product Reviews for WooCommerce plugin developed by Wisernotify team. This Broken Access Control vulnerability allows authenticated attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within the WordPress environment.

The vulnerability stems from missing authorization checks (CWE-862), which means the plugin fails to properly verify whether a user has appropriate permissions before allowing certain operations. This type of flaw can allow low-privileged users to perform actions that should be restricted to administrators or other authorized roles.

Critical Impact

Authenticated attackers with minimal privileges can bypass access controls to perform unauthorized modifications within WooCommerce product review functionality.

Affected Products

• WiserReview Product Reviews for WooCommerce plugin versions from n/a through <= 2.9
• WordPress installations running vulnerable versions of the wiser-review plugin
• WooCommerce stores utilizing WiserReview for product review management

Discovery Timeline

• 2026-02-19 - CVE-2026-25318 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25318

Vulnerability Analysis

This Missing Authorization vulnerability (CWE-862) occurs when the WiserReview plugin fails to implement proper capability checks before executing privileged functions. In WordPress plugins, authorization should be enforced using capability checks such as current_user_can() to verify the requesting user has appropriate permissions.

The vulnerability allows authenticated users to exploit incorrectly configured access control security levels. This means that any logged-in user, regardless of their assigned role, may be able to access functionality intended only for administrators or shop managers.

Root Cause

The root cause is the absence of proper authorization checks within the plugin's codebase. When handling AJAX requests or processing form submissions, the plugin does not verify that the current user possesses the necessary capabilities to perform the requested action. This is a common security oversight in WordPress plugin development where developers may rely solely on authentication (checking if a user is logged in) without implementing proper authorization (checking if the user has permission).

Attack Vector

The attack requires network access and a low-privileged authenticated account on the target WordPress installation. An attacker can exploit this vulnerability by:

1. Creating or compromising a low-privileged WordPress user account (e.g., Subscriber role)
2. Identifying unprotected AJAX endpoints or form handlers within the WiserReview plugin
3. Crafting requests to these endpoints that bypass intended access restrictions
4. Executing unauthorized actions such as modifying review settings, accessing restricted data, or manipulating product reviews

The vulnerability requires no user interaction beyond the attacker's own authenticated session. While the integrity impact is limited, the ability to modify data without authorization presents a significant security concern for e-commerce sites relying on authentic product reviews.

Detection Methods for CVE-2026-25318

Indicators of Compromise

• Unexpected modifications to WooCommerce product reviews or review settings
• Audit logs showing low-privileged users accessing administrative review functions
• AJAX requests to WiserReview plugin endpoints from unauthorized user sessions
• Changes to review configurations that were not initiated by administrators

Detection Strategies

• Monitor WordPress audit logs for unusual activity from subscriber or customer-level accounts
• Implement web application firewall (WAF) rules to detect anomalous requests to the wiser-review plugin endpoints
• Review server access logs for POST requests to WiserReview AJAX handlers from unexpected user contexts
• Deploy file integrity monitoring to detect unauthorized changes to plugin files or database entries

Monitoring Recommendations

• Enable comprehensive WordPress activity logging using security plugins
• Configure alerts for administrative actions performed by non-administrative users
• Regularly audit user permissions and review access patterns for the WooCommerce installation
• Implement real-time monitoring for changes to product review data and plugin settings

How to Mitigate CVE-2026-25318

Immediate Actions Required

• Update WiserReview Product Reviews for WooCommerce to a patched version when available from the vendor
• Audit recent activity on your WordPress installation for signs of unauthorized access
• Review and restrict user account permissions, removing unnecessary accounts
• Implement additional access controls at the web server or WAF level to restrict plugin functionality

Patch Information

Currently, versions through 2.9 are confirmed vulnerable. Site administrators should monitor the Patchstack WordPress Vulnerability Report for updates on patched versions and apply security updates as soon as they become available from the Wisernotify team.

Workarounds

• Temporarily disable the WiserReview plugin until a security patch is released
• Restrict WordPress registration and remove unnecessary user accounts to minimize attack surface
• Implement WordPress capability restrictions using a security plugin to limit AJAX endpoint access
• Configure your WAF to block or monitor requests to WiserReview plugin endpoints from non-administrative users
• Consider using WordPress security plugins that provide virtual patching capabilities for vulnerable plugins

# Temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate wiser-review

# List all users to audit accounts
wp user list --fields=ID,user_login,user_email,roles

# Remove unnecessary subscriber accounts
wp user delete <user_id> --reassign=<admin_user_id>