CVE-2025-69358: EventPrime Authorization Bypass Vulnerability

CVE-2025-69358 Overview

CVE-2025-69358 is a missing authorization vulnerability in the Metagauss EventPrime plugin (eventprime-event-calendar-management) for WordPress. The flaw stems from incorrectly configured access control security levels, allowing unauthenticated attackers to invoke plugin functionality that should be restricted. The issue affects all EventPrime versions up to and including 4.2.6.0. Successful exploitation enables attackers to modify data managed by the plugin without holding the required privileges. The vulnerability is tracked under CWE-862: Missing Authorization and was published to the National Vulnerability Database on 2026-03-25.

Critical Impact
Unauthenticated attackers can reach restricted plugin endpoints over the network and tamper with event calendar data on affected WordPress sites.

Affected Products

Metagauss EventPrime (eventprime-event-calendar-management) WordPress plugin
All versions from initial release through 4.2.6.0
WordPress installations that have the EventPrime plugin active

Discovery Timeline

2026-03-25 - CVE-2025-69358 published to NVD
2026-04-27 - Last updated in NVD database

Technical Details for CVE-2025-69358

Vulnerability Analysis

The EventPrime plugin exposes one or more action handlers that lack proper capability checks. Authorization logic is either missing entirely or configured at an incorrect security level, so requests bypass the intended privilege gate. An attacker reaches the vulnerable functionality through standard WordPress request entry points such as admin-ajax.php or REST routes. No authentication is required, and no user interaction is needed.

The issue affects data integrity rather than confidentiality or availability. Attackers can alter records managed by EventPrime, including event entries and related configuration. The Patchstack advisory classifies the issue as a broken access control vulnerability impacting all releases up to 4.2.6.0. See the Patchstack WordPress Vulnerability advisory for vendor-specific detail.

Root Cause

The root cause is missing or insufficient authorization enforcement in plugin action handlers. WordPress plugins must validate user capabilities using functions such as current_user_can() and verify request authenticity with nonces. EventPrime fails to apply these controls consistently on sensitive operations, leaving them reachable by unauthenticated clients.

Attack Vector

The attack vector is network-based with low complexity. An attacker sends crafted HTTP requests to the WordPress site hosting a vulnerable EventPrime installation. The request targets the unprotected plugin action, and the server processes it without verifying the caller's role or capabilities. No credentials, tokens, or user interaction are required.

No verified public proof-of-concept code is available at the time of writing. Refer to the linked Patchstack advisory for technical specifics on the affected endpoints.

Detection Methods for CVE-2025-69358

Indicators of Compromise

Unexpected creation, modification, or deletion of events, bookings, or settings managed by EventPrime
HTTP POST requests to admin-ajax.php with EventPrime-specific action parameters originating from unauthenticated sessions
Requests to EventPrime REST routes under /wp-json/ from IP addresses with no prior login activity
New or altered plugin records in the WordPress database without a corresponding administrator audit trail

Detection Strategies

Inspect web server access logs for requests to EventPrime endpoints that lack a valid wordpress_logged_in_* cookie
Correlate database write events on EventPrime tables with the authenticated session of the requester
Alert on bursts of requests to plugin AJAX or REST handlers from a single source over a short window
Compare current plugin version against 4.2.6.0 across the estate to identify exposed installations

Monitoring Recommendations

Forward WordPress and web server logs to a centralized analytics platform for correlation
Monitor file integrity on the wp-content/plugins/eventprime-event-calendar-management/ directory
Track outbound responses with anomalous sizes from EventPrime endpoints, which can indicate data manipulation
Review WordPress audit logs for changes to plugin-managed content lacking an authenticated actor

How to Mitigate CVE-2025-69358

Immediate Actions Required

Identify all WordPress sites running EventPrime version 4.2.6.0 or earlier
Update the plugin to a fixed release as published by Metagauss once available
Restrict access to /wp-admin/admin-ajax.php and /wp-json/ from untrusted networks where feasible
Audit EventPrime data for unauthorized modifications since the plugin was installed

Patch Information

The Patchstack entry confirms the vulnerability is present through version 4.2.6.0. Apply the vendor-supplied patched release of eventprime-event-calendar-management once it is published. Verify the installed version after upgrade with wp plugin list --name=eventprime-event-calendar-management if using WP-CLI.

Workarounds

Deactivate the EventPrime plugin until a patched version can be installed
Place the WordPress site behind a web application firewall with rules blocking unauthenticated requests to EventPrime action handlers
Limit access to plugin endpoints by IP allowlist at the reverse proxy or hosting layer
Enforce least privilege on WordPress roles to reduce the blast radius of any related abuse

bash

# Configuration example: block unauthenticated POSTs to EventPrime AJAX actions at nginx
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "^ep_") {
        if ($http_cookie !~* "wordpress_logged_in_") {
            return 403;
        }
    }
    include fastcgi_params;
    fastcgi_pass php_upstream;
}