CVE-2025-69358

Executive Summary

CVE-2025-69358 is a Missing Authorization vulnerability in the Metagauss EventPrime WordPress plugin (versions <= 4.2.6.0). This flaw allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or privilege escalation. The vulnerability resides in the eventprime-event-calendar-management component and has a CVSS score of 7.5 (High). No public proof-of-concept or patch details are currently available, but the risk is elevated due to the widespread use of WordPress and the plugin's popularity for event management.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users should verify plugin integrity via checksums and monitor for updates from the vendor. No known supply chain compromise has been reported, but the lack of a patch increases the risk of malicious actors exploiting this in the wild.

CVSS Breakdown & Threat Level

• CVSS Score: 7.5 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: None
• Availability Impact: None

The vulnerability is easily exploitable remotely without authentication, making it a high-priority target for attackers seeking to extract sensitive event data or user information.

Deep Dive & Mechanics

The EventPrime plugin manages event calendars, bookings, and user registrations. The missing authorization flaw likely occurs in REST API endpoints or AJAX handlers that fail to verify user capabilities before processing requests. Attackers can craft HTTP requests to access or modify event data, attendee lists, or administrative settings without proper authentication.

Root Cause: The plugin does not enforce capability checks (e.g., current_user_can()) on certain functions, allowing unauthenticated access to privileged operations.

Attack Vector: An attacker sends a crafted HTTP request to a vulnerable endpoint (e.g., /wp-json/eventprime/v1/events or an AJAX action) with manipulated parameters to bypass access controls.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code pattern is hypothesized based on common WordPress plugin flaws:

Vulnerable Code (hypothetical):

add_action('wp_ajax_nopriv_eventprime_get_events', 'eventprime_get_events');
function eventprime_get_events() {
    // No capability check
    $events = get_posts(['post_type' => 'event']);
    wp_send_json($events);
}

Patched Code (expected):

add_action('wp_ajax_eventprime_get_events', 'eventprime_get_events');
add_action('wp_ajax_nopriv_eventprime_get_events', 'eventprime_get_events_public');
function eventprime_get_events() {
    if (!current_user_can('edit_events')) {
        wp_die('Unauthorized', 403);
    }
    $events = get_posts(['post_type' => 'event']);
    wp_send_json($events);
}
function eventprime_get_events_public() {
    // Only return public events
    $events = get_posts(['post_type' => 'event', 'meta_key' => 'public', 'meta_value' => '1']);
    wp_send_json($events);
}

Exploitation & Lab Setup

Red Team

Prerequisites: A WordPress instance with EventPrime <= 4.2.6.0 installed and active.

Exploitation Steps:

1. Identify vulnerable endpoints using a WordPress scanner (e.g., WPScan).
2. Send a crafted HTTP request to a privileged endpoint without authentication:

   curl -X GET "http://target/wp-json/eventprime/v1/admin/events" -H "Content-Type: application/json"
   

3. If successful, the response will contain sensitive event data or administrative options.

Proof-of-Concept (No public exploit available):

import requests
target = "http://target.com"
endpoint = "/wp-json/eventprime/v1/admin/events"
response = requests.get(target + endpoint)
if response.status_code == 200:
    print("Vulnerable! Data:", response.text)
else:
    print("Not vulnerable or patched")

Blue Team

Detection & Response:

• Monitor for unusual HTTP requests to /wp-json/eventprime/* or AJAX actions without authentication.
• Implement Web Application Firewall (WAF) rules to block unauthenticated access to admin endpoints.
• Use the Sigma rule below to detect exploitation attempts in logs.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /wp-json/eventprime/v1/admin/* or /wp-admin/admin-ajax.php?action=eventprime_* without a valid X-WP-Nonce header.
• Logs: WordPress debug logs showing wp_die calls or 403 errors on EventPrime endpoints.
• File: Modified plugin files in /wp-content/plugins/eventprime-event-calendar-management/ with unexpected code.

Detection Engineering

YARA Rule

rule CVE_2025_69358_EventPrime_Missing_Auth {
    meta:
        description = "Detects exploitation attempts for CVE-2025-69358 in EventPrime plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-69358"
    strings:
        $s1 = "eventprime" nocase
        $s2 = "wp_ajax_nopriv" nocase
        $s3 = "get_events" nocase
        $s4 = "current_user_can" nocase
    condition:
        all of ($s1, $s2, $s3) and not $s4
}

Sigma Rule

title: CVE-2025-69358 EventPrime Missing Authorization Exploitation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects unauthenticated access to EventPrime admin endpoints
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-uri-query|contains:
            - '/wp-json/eventprime/v1/admin'
            - 'action=eventprime_admin'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate admin users with valid nonces
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69358 EventPrime Missing Authorization Exploitation"; flow:to_server,established; content:"/wp-json/eventprime/v1/admin"; http_uri; nocase; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin if not critical for operations until a patch is released.
2. Implement a Web Application Firewall (WAF) rule to block unauthenticated requests to /wp-json/eventprime/* and /wp-admin/admin-ajax.php?action=eventprime_*.
3. Restrict network access to the WordPress admin panel via IP whitelisting.

Long-term Fix:

• Monitor the Metagauss plugin repository for an official patch (expected in version > 4.2.6.0).
• Apply the principle of least privilege by ensuring all plugin endpoints check user capabilities.
• Regularly audit WordPress plugins for missing authorization vulnerabilities.

Valters IT Signature: This report was generated by Valters IT DevSecOps AI. For questions, contact Secure Channels (Signal / Portal).

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