CVE-2026-59557: Events Made Easy Auth Bypass Vulnerability

CVE-2026-59557 Overview

CVE-2026-59557 is a broken access control vulnerability affecting the Events Made Easy WordPress plugin in versions 3.1.3 and earlier. The flaw allows unauthenticated attackers to reach functionality that should require authorization checks. It is categorized under [CWE-862] Missing Authorization.

The vulnerability is exploitable over the network with low attack complexity and no user interaction. Attackers do not need credentials to abuse the exposed functionality. The impact is limited to partial integrity and availability loss on the target WordPress site.

Critical Impact
Unauthenticated attackers can invoke protected plugin actions on WordPress sites running Events Made Easy 3.1.3 or earlier, potentially modifying event data or affecting site availability.

Affected Products

Events Made Easy WordPress plugin versions 3.1.3 and earlier
WordPress sites with the vulnerable plugin installed and activated
Any hosting environment exposing the affected plugin endpoints to the internet

Discovery Timeline

2026-07-27 - CVE-2026-59557 published to NVD
2026-07-27 - Last updated in NVD database

Technical Details for CVE-2026-59557

Vulnerability Analysis

Events Made Easy is a WordPress plugin used to manage events, registrations, and bookings. Versions up to and including 3.1.3 contain a broken access control weakness in one or more plugin endpoints. The affected handlers do not verify the caller's capabilities or authentication state before executing sensitive operations.

The issue is tracked as [CWE-862] Missing Authorization. Reachable endpoints accept requests from anonymous users and act on them as though the caller were authorized. This bypasses the WordPress capability model that the plugin should enforce through current_user_can() checks or nonce validation.

The EPSS score at time of publication is 0.242%, indicating a relatively low observed likelihood of exploitation in the near term. No public proof-of-concept or in-the-wild exploitation has been confirmed.

Root Cause

The root cause is the absence of authorization enforcement on plugin request handlers. Handlers registered through actions such as admin_post_*, wp_ajax_nopriv_*, or REST routes execute their logic without confirming that the request comes from a user with the required capability. Nonce verification, if present, is not sufficient without an accompanying capability check.

Attack Vector

An attacker sends crafted HTTP requests directly to the vulnerable plugin endpoint on a target WordPress site. Because authentication is not required, the attacker can automate scanning and exploitation across many sites. Successful invocation modifies plugin-managed data or triggers actions that degrade site availability.

Refer to the Patchstack WordPress Vulnerability Report for technical details on the specific endpoint.

Detection Methods for CVE-2026-59557

Indicators of Compromise

Unauthenticated POST or GET requests to Events Made Easy plugin endpoints such as admin-ajax.php with plugin-specific action parameters
Unexpected creation, modification, or deletion of event, booking, or registration records
Anomalous request volume from a single source IP to WordPress endpoints exposed by the plugin

Detection Strategies

Inspect web server access logs for requests targeting wp-admin/admin-ajax.php and wp-admin/admin-post.php with action values tied to the Events Made Easy plugin from unauthenticated sessions
Monitor the WordPress database for changes to plugin tables that are not associated with an authenticated administrative session
Deploy web application firewall rules that flag repeated calls to plugin actions without a valid logged-in user cookie

Monitoring Recommendations

Enable verbose logging on the WordPress instance, including plugin actions, and forward logs to a centralized analytics platform
Alert on spikes in 4xx and 2xx responses to plugin endpoints from single source IPs
Correlate WordPress audit events with edge WAF telemetry to identify scanning and exploitation attempts

How to Mitigate CVE-2026-59557

Immediate Actions Required

Identify all WordPress sites running Events Made Easy version 3.1.3 or earlier and prioritize them for patching
Update the plugin to a version above 3.1.3 as soon as a fixed release is available from the vendor
Restrict access to wp-admin/admin-ajax.php and admin-post.php from untrusted networks where feasible

Patch Information

Refer to the Patchstack WordPress Vulnerability Report for the current fixed version and vendor patch status. Apply the update through the WordPress plugin manager or wp-cli.

Workarounds

Disable the Events Made Easy plugin until a patched version is installed if the affected functionality is not business-critical
Deploy WAF rules that block unauthenticated requests to the plugin's action handlers
Enforce IP allowlisting on the WordPress admin surface where operationally feasible

bash

# Update Events Made Easy using wp-cli once a fixed version is published
wp plugin update events-made-easy

# Or temporarily deactivate the plugin site-wide
wp plugin deactivate events-made-easy