CVE-2026-24380: EventPrime Authorization Bypass Vulnerability

CVE-2026-24380 Overview

CVE-2026-24380 is a Missing Authorization vulnerability (CWE-862) affecting the Metagauss EventPrime event calendar management plugin for WordPress. This broken access control flaw allows attackers to exploit incorrectly configured access control security levels, potentially gaining unauthorized access to protected functionality within the plugin.

The vulnerability stems from missing authorization checks in the EventPrime plugin, which could allow unauthenticated or low-privileged users to perform actions that should be restricted to administrators or other authorized roles.

Critical Impact

Attackers can exploit missing authorization checks to bypass access controls and perform unauthorized actions within the EventPrime event calendar management system.

Affected Products

• Metagauss EventPrime (eventprime-event-calendar-management) versions through 4.2.8.0
• WordPress installations using the affected EventPrime plugin versions

Discovery Timeline

• 2026-01-22 - CVE-2026-24380 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2026-24380

Vulnerability Analysis

This vulnerability is classified as Missing Authorization (CWE-862), a type of broken access control flaw. The EventPrime plugin fails to properly verify that users have the necessary permissions before allowing access to certain functionality. This authorization gap means that security controls are not correctly enforced, allowing potential attackers to access or modify resources they should not have permissions to interact with.

In WordPress plugin development, proper authorization requires implementing capability checks using functions like current_user_can() before executing privileged operations. When these checks are missing or improperly implemented, it creates an opportunity for unauthorized access.

Root Cause

The root cause of this vulnerability is the absence of proper authorization verification in the EventPrime plugin. The plugin does not adequately check user capabilities or roles before allowing access to certain functions or data. This is a common security oversight in WordPress plugin development where developers may implement authentication (verifying identity) but neglect authorization (verifying permissions).

Attack Vector

An attacker can exploit this vulnerability by directly accessing plugin endpoints or functions that lack proper authorization checks. Without the need for administrative credentials, a malicious user could potentially:

1. Access event management functions reserved for administrators
2. Modify event data or settings without proper permissions
3. Access sensitive information that should be restricted to authorized users

The attack does not require sophisticated techniques—simply interacting with the vulnerable functionality while lacking the proper authorization is sufficient to exploit this flaw.

Detection Methods for CVE-2026-24380

Indicators of Compromise

• Unexpected modifications to EventPrime event data or settings by non-administrative users
• Access logs showing requests to EventPrime admin endpoints from unauthorized users
• Audit trail entries indicating privilege-level actions performed by low-privilege accounts
• Unusual patterns in event creation, modification, or deletion activities

Detection Strategies

• Review WordPress access logs for requests to EventPrime plugin endpoints from unauthenticated or low-privilege users
• Implement WordPress security plugins that monitor for unauthorized access attempts
• Enable detailed audit logging for all EventPrime plugin actions
• Monitor for unusual changes to event data that cannot be attributed to authorized administrators

Monitoring Recommendations

• Configure security monitoring to alert on access to administrative EventPrime functions by non-admin users
• Implement web application firewall (WAF) rules to detect and block unauthorized access patterns
• Regularly audit user activity logs for suspicious behavior within the EventPrime plugin
• Set up file integrity monitoring for EventPrime plugin files to detect unauthorized modifications

How to Mitigate CVE-2026-24380

Immediate Actions Required

• Update the EventPrime plugin to the latest version that addresses this vulnerability
• Review user roles and capabilities to ensure appropriate access restrictions are in place
• Audit recent EventPrime activity for signs of unauthorized access
• Consider temporarily disabling the plugin if updates are not immediately available and the functionality is not critical

Patch Information

Users should update the EventPrime event calendar management plugin to a version newer than 4.2.8.0 that includes the security fix for this authorization bypass vulnerability. Check the Patchstack WordPress Vulnerability Report for the latest patch information and vendor advisories.

Workarounds

• Restrict access to the WordPress admin area using IP allowlisting at the server or network level
• Implement additional authentication layers such as two-factor authentication for WordPress administrators
• Use a WordPress security plugin to add capability-based access restrictions to plugin functionality
• Monitor and limit user registrations if the vulnerability can be exploited by authenticated users

# WordPress CLI command to check EventPrime plugin version
wp plugin list --name=eventprime-event-calendar-management --fields=name,version,status

# Update EventPrime plugin to latest version
wp plugin update eventprime-event-calendar-management

# Alternatively, disable the plugin until patched version is available
wp plugin deactivate eventprime-event-calendar-management