CVE-2026-22490: LPagery Auth Bypass Vulnerability

CVE-2026-22490 Overview

CVE-2026-22490 is a Missing Authorization vulnerability affecting the Bulk Landing Page Creator for WordPress (LPagery) plugin developed by niklaslindemann. This broken access control flaw allows authenticated attackers with low privileges to exploit incorrectly configured access control security levels, potentially leading to unauthorized modifications and limited denial of service conditions.

Critical Impact

Authenticated attackers can bypass authorization controls to perform unauthorized actions, potentially modifying content and causing limited availability disruptions to WordPress sites using the vulnerable LPagery plugin.

Affected Products

• Bulk Landing Page Creator for WordPress LPagery versions through 2.4.9
• WordPress installations with the LPagery plugin enabled

Discovery Timeline

• 2026-01-08 - CVE CVE-2026-22490 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-22490

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), which occurs when a software application does not perform authorization checks when an actor attempts to access a resource or perform an action. In the case of the LPagery WordPress plugin, certain functionality lacks proper capability checks, allowing users with limited privileges to perform actions that should be restricted to administrators or higher-privileged users.

The network-accessible nature of this vulnerability means attackers can exploit it remotely through the WordPress interface without requiring physical access. While user interaction is not required for exploitation, the attacker must possess valid credentials with at least subscriber-level access to the WordPress installation.

Root Cause

The root cause stems from missing authorization checks within the LPagery plugin's codebase. WordPress plugins typically implement capability checks using functions like current_user_can() to verify whether the current user has permission to perform specific actions. When these checks are absent or improperly implemented, lower-privileged users can access functionality intended for administrators.

The vulnerability specifically affects access control security levels, suggesting that plugin endpoints or AJAX handlers process requests without adequately verifying the requesting user's role and capabilities.

Attack Vector

The attack vector is network-based, requiring only low-level authenticated access to the WordPress site. An attacker with subscriber or contributor credentials could:

1. Identify unprotected AJAX endpoints or plugin functionality
2. Craft requests to access restricted features
3. Modify landing page configurations or settings without proper authorization
4. Potentially cause service disruptions through unauthorized modifications

The exploitation does not require user interaction and can be performed directly against the vulnerable WordPress installation. For detailed technical analysis, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-22490

Indicators of Compromise

• Unexpected modifications to landing pages created by LPagery that were not authorized by administrators
• Unusual AJAX requests to LPagery plugin endpoints from low-privileged user accounts
• WordPress audit logs showing plugin settings changes by non-administrator users
• Access logs revealing repeated requests to LPagery-specific endpoints from unauthorized accounts

Detection Strategies

• Monitor WordPress admin-ajax.php requests for LPagery-related actions from non-administrator sessions
• Implement WordPress activity logging plugins to track plugin interactions and identify unauthorized access patterns
• Review Apache/Nginx access logs for unusual POST requests to plugin directories
• Configure alerts for user capability escalation attempts or unauthorized plugin configuration changes

Monitoring Recommendations

• Enable comprehensive WordPress audit logging to track all plugin-related activities
• Configure real-time alerting for changes to LPagery settings or landing page configurations
• Regularly review user access patterns and identify anomalous behavior from low-privilege accounts
• Implement endpoint monitoring for WordPress AJAX handlers associated with the LPagery plugin

How to Mitigate CVE-2026-22490

Immediate Actions Required

• Update the LPagery plugin to the latest version beyond 2.4.9 immediately
• Review all user accounts on the WordPress installation and verify appropriate privilege levels
• Audit recent changes to landing pages and plugin settings for unauthorized modifications
• Consider temporarily disabling the LPagery plugin if an update is not immediately available

Patch Information

Administrators should update the Bulk Landing Page Creator for WordPress (LPagery) plugin through the WordPress plugin repository to obtain the security fix. The vulnerability affects all versions through 2.4.9, so ensure your installation is running a patched version.

For detailed patch information and security advisory, refer to the Patchstack Vulnerability Report.

Workarounds

• Restrict user registration and limit the number of authenticated users with access to the WordPress backend
• Implement additional access control through a Web Application Firewall (WAF) to filter requests to LPagery endpoints
• Review and remove unnecessary user accounts, particularly those with subscriber or contributor roles
• Consider implementing IP-based restrictions for WordPress admin access if feasible

# WordPress plugin management - Check current LPagery version
wp plugin list --name=lpagery --fields=name,version,status

# Update LPagery to latest version
wp plugin update lpagery

# Audit user roles for potential threat actors
wp user list --role=subscriber --fields=ID,user_login,user_email

# Temporarily disable plugin if immediate patching is not possible
wp plugin deactivate lpagery