CVE-2025-47565: EventON Authorization Bypass Vulnerability

CVE-2025-47565 Overview

CVE-2025-47565 is a missing authorization vulnerability in the ashanjay EventON WordPress plugin. The flaw affects all versions up to and including 4.9.9. The plugin fails to enforce access control checks on protected functionality, allowing authenticated users with low privileges to interact with resources they should not access. The issue maps to CWE-862: Missing Authorization and stems from incorrectly configured access control security levels within the plugin.

Critical Impact

An authenticated attacker with minimal privileges can exploit incorrectly configured access controls to compromise the confidentiality, integrity, and availability of EventON plugin data over the network.

Affected Products

• ashanjay EventON WordPress plugin versions up to and including 4.9.9
• WordPress sites running the vulnerable EventON plugin
• Any deployment exposing the plugin's protected endpoints to authenticated users

Discovery Timeline

• 2025-07-04 - CVE-2025-47565 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47565

Vulnerability Analysis

The EventON plugin exposes functionality that lacks proper authorization checks. When a request reaches a protected handler, the plugin does not verify that the caller possesses the required capability or role. This allows authenticated users at low privilege levels to invoke operations reserved for higher-privileged roles.

The vulnerability requires network access and low privileges to exploit. No user interaction is needed. The scope remains unchanged, and impact is limited across confidentiality, integrity, and availability of plugin-managed data. Successful exploitation does not lead directly to full site takeover, but can expose event data, alter plugin state, or disrupt scheduled event functionality.

Root Cause

The root cause is an access control implementation that relies on assumptions about user context rather than explicit capability verification. Handlers within the plugin process requests without invoking WordPress capability functions such as current_user_can() or nonce checks tied to a specific capability. This design pattern satisfies CWE-862, where the software does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack Vector

Exploitation requires an attacker to hold an authenticated WordPress account at any privilege level, including subscriber. The attacker sends crafted HTTP requests to the EventON plugin endpoints that lack authorization enforcement. Because the plugin does not validate the caller's capability, the request executes as if the attacker were authorized. The Patchstack advisory documents the affected endpoints and request patterns. See the Patchstack WordPress Plugin Advisory for endpoint-level detail.

No public exploit code has been published, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS score is 0.254% as of 2026-09-29.

Detection Methods for CVE-2025-47565

Indicators of Compromise

• Unexpected HTTP POST or GET requests from low-privilege authenticated sessions to EventON plugin AJAX endpoints under /wp-admin/admin-ajax.php with EventON action parameters
• WordPress audit log entries showing subscriber or contributor accounts triggering EventON administrative actions
• Unauthorized modifications to event records, categories, or plugin settings not attributable to administrators

Detection Strategies

• Enable WordPress audit logging plugins to capture capability checks and AJAX action invocations tied to EventON
• Review web server access logs for POST requests to EventON endpoints originating from non-administrative user sessions
• Correlate authenticated session activity with role assignments to identify privilege mismatches

Monitoring Recommendations

• Alert on any modification to EventON event data performed by accounts below the editor role
• Monitor for spikes in requests to EventON AJAX handlers from a single authenticated user
• Track plugin version inventory across WordPress installations to identify hosts running EventON <= 4.9.9

How to Mitigate CVE-2025-47565

Immediate Actions Required

• Update the EventON plugin to a version later than 4.9.9 as soon as the vendor patch is available
• Audit existing WordPress user accounts and remove unnecessary low-privilege accounts that could be abused
• Review recent event data and plugin configuration for unauthorized changes

Patch Information

The vulnerability affects EventON versions up to and including 4.9.9. Site administrators should consult the Patchstack WordPress Plugin Advisory for the fixed version number and upgrade guidance. Apply the vendor patch through the WordPress plugin update mechanism once published.

Workarounds

• Restrict access to /wp-admin/admin-ajax.php EventON action parameters using a web application firewall rule until the patch is applied
• Temporarily disable the EventON plugin on sites that do not require its functionality
• Enforce strong registration controls and disable self-registration for sites that do not require public account creation

# Example WAF rule pattern to block EventON AJAX actions from low-privilege sessions
# Adjust action names based on the Patchstack advisory endpoint list
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
    "chain,deny,status:403,id:1004755,msg:'Block EventON action for CVE-2025-47565'"
    SecRule ARGS:action "@rx ^(eventon_|evo_)" \
        "chain"
        SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"