CVE-2026-25323: MiKa OSM Authorization Bypass Vulnerability

CVE-2026-25323 Overview

CVE-2026-25323 is a Missing Authorization vulnerability (CWE-862) affecting the MiKa OSM plugin for WordPress. This broken access control flaw allows attackers to exploit incorrectly configured access control security levels within the OSM plugin, potentially enabling unauthorized actions that should require proper authentication or elevated privileges.

Critical Impact

Attackers can bypass authorization checks in the WordPress OSM plugin, potentially gaining access to restricted functionality or data without proper credentials.

Affected Products

• MiKa OSM Plugin versions up to and including 6.1.12
• WordPress installations using the vulnerable OSM plugin
• All installations with default or misconfigured access control settings

Discovery Timeline

• 2026-02-19 - CVE CVE-2026-25323 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25323

Vulnerability Analysis

This vulnerability stems from a Missing Authorization weakness (CWE-862) in the MiKa OSM WordPress plugin. The plugin fails to properly verify that users have appropriate permissions before allowing access to certain functionality. This type of broken access control vulnerability occurs when an application does not perform adequate authorization checks, allowing users to access resources or perform actions beyond their intended privilege level.

In the context of WordPress plugins, missing authorization typically manifests when plugin endpoints, AJAX handlers, or REST API routes lack proper capability checks using WordPress functions like current_user_can(). Without these checks, unauthenticated or low-privilege users may be able to invoke functionality that should be restricted to administrators or other authorized roles.

Root Cause

The root cause of CVE-2026-25323 is the absence of proper authorization verification within the OSM plugin's code paths. The plugin fails to implement adequate access control checks before executing sensitive operations, allowing requests to bypass security controls that should enforce role-based permissions. This is a common vulnerability pattern in WordPress plugins where developers may overlook the need to verify user capabilities before processing requests.

Attack Vector

An attacker can exploit this vulnerability by sending crafted requests to the vulnerable OSM plugin endpoints without proper authentication or with insufficient privileges. The missing authorization checks allow the attacker to:

1. Access restricted plugin functionality intended for administrators
2. Modify plugin settings or data without proper credentials
3. Potentially chain this vulnerability with other weaknesses to escalate impact

The exploitation does not require complex techniques—attackers simply need to identify the unprotected endpoints and submit requests directly. For detailed technical information about this vulnerability, see the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-25323

Indicators of Compromise

• Unexpected modifications to OSM plugin settings or configurations
• Unusual access patterns to WordPress admin AJAX endpoints related to the OSM plugin
• Authentication logs showing access to restricted functionality by unauthenticated or low-privilege users
• Anomalous plugin-related database entries or file modifications

Detection Strategies

• Monitor WordPress access logs for requests to OSM plugin endpoints from unauthenticated sessions
• Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting plugin endpoints
• Enable WordPress security audit logging to track changes to plugin settings and configurations
• Review AJAX handler access patterns for anomalous behavior indicating authorization bypass attempts

Monitoring Recommendations

• Deploy file integrity monitoring on WordPress plugin directories to detect unauthorized changes
• Configure alerting for failed or suspicious authentication attempts related to plugin functionality
• Implement real-time monitoring of WordPress admin activity logs
• Regularly audit user capabilities and plugin permission configurations

How to Mitigate CVE-2026-25323

Immediate Actions Required

• Update the MiKa OSM plugin to a version newer than 6.1.12 once a patched version becomes available
• Review and restrict access to the WordPress admin interface to trusted IP addresses
• Implement additional access control layers using security plugins or WAF rules
• Audit existing user accounts and remove unnecessary administrative privileges

Patch Information

At the time of publication, organizations should monitor the official WordPress plugin repository and the Patchstack vulnerability database for updates regarding a security patch. Users should update to the latest version of the OSM plugin as soon as a fix is released by the plugin maintainer MiKa.

Workarounds

• Temporarily disable the OSM plugin if it is not critical to site functionality
• Implement WordPress capability checks at the server level using .htaccess or nginx configuration rules
• Use a WordPress security plugin to add additional authorization layers to plugin endpoints
• Restrict access to wp-admin and AJAX endpoints to authenticated users with verified permissions

# Example .htaccess restriction for wp-admin AJAX
<Files admin-ajax.php>
    <RequireAll>
        Require all granted
    </RequireAll>
</Files>

# Consider implementing IP-based restrictions for admin functionality
# Add to .htaccess in wp-admin directory
<IfModule mod_authz_core.c>
    Require ip 192.168.1.0/24
    Require ip 10.0.0.0/8
</IfModule>