CVE-2025-57907: Heureka Authorization Bypass Vulnerability

CVE-2025-57907 Overview

CVE-2025-57907 is a Missing Authorization vulnerability [CWE-862] in the Heureka Group Heureka plugin for WordPress. The flaw affects all versions of the plugin up to and including 1.1.0. The plugin fails to properly enforce Access Control Lists (ACLs) on functionality that should be restricted to authorized users. Remote attackers can access this functionality over the network without authentication or user interaction. Successful exploitation results in limited impact to data integrity, with no direct impact to confidentiality or availability.

Critical Impact
Unauthenticated network attackers can invoke restricted plugin functionality, bypassing access controls to modify data managed by the Heureka plugin on affected WordPress sites.

Affected Products

Heureka Group Heureka WordPress plugin, versions n/a through 1.1.0
WordPress sites with the Heureka plugin installed and activated
All WordPress deployments exposing plugin endpoints to the network

Discovery Timeline

2025-09-22 - CVE-2025-57907 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-57907

Vulnerability Analysis

The Heureka plugin exposes functionality that should be gated by capability or role checks, but the plugin does not enforce these controls consistently. This falls under Broken Access Control, specifically classified as Missing Authorization [CWE-862]. An attacker can call the affected endpoints directly without possessing the required privileges. The result is unauthorized access to plugin functions that alter integrity-sensitive state. The vulnerability does not require authentication or user interaction, which lowers the barrier to exploitation across public-facing WordPress sites.

Root Cause

The root cause is the absence of authorization checks on plugin request handlers. WordPress plugins typically enforce access using functions such as current_user_can() or nonce validation via check_ajax_referer(). In the Heureka plugin up to version 1.1.0, one or more handlers omit these checks, allowing arbitrary callers to reach the underlying logic. The Patchstack advisory categorizes the issue as a broken access control flaw in the plugin's action or endpoint routing layer.

Attack Vector

An attacker sends crafted HTTP requests to the WordPress site targeting the plugin's exposed endpoints, such as admin-ajax.php actions or REST routes registered by the plugin. Because no authorization is performed, the server executes the requested function on behalf of the unauthenticated caller. The impact is limited to integrity changes within the scope of the affected functionality. No verified public exploit code is currently listed, and the vulnerability is not present on the CISA Known Exploited Vulnerabilities catalog.

See the Patchstack WordPress Vulnerability Report for advisory details.

Detection Methods for CVE-2025-57907

Indicators of Compromise

Unexpected POST requests to /wp-admin/admin-ajax.php referencing Heureka plugin actions from unauthenticated sessions
Unexplained modifications to plugin-managed data, settings, or product feeds
Access log entries showing plugin endpoints called without a valid wordpress_logged_in_* cookie

Detection Strategies

Inventory WordPress installations to identify sites running the Heureka plugin at version 1.1.0 or earlier
Review web server access logs for requests to Heureka plugin routes originating from unauthenticated clients
Correlate plugin-related database writes with the identity of the requesting session to detect unauthorized changes

Monitoring Recommendations

Alert on high-frequency or anomalous requests to admin-ajax.php with Heureka-related action parameters
Monitor the WordPress options and plugin-specific tables for changes made outside of authenticated administrative sessions
Track new or unusual outbound integrations initiated by the plugin that may signal abuse of restricted functionality

How to Mitigate CVE-2025-57907

Immediate Actions Required

Identify all WordPress instances with the Heureka plugin installed and confirm the installed version
Update the Heureka plugin to a version above 1.1.0 once a patched release is published by Heureka Group
Restrict access to wp-admin and admin-ajax.php at the network or WAF layer for untrusted sources where feasible

Patch Information

Refer to the Patchstack advisory for the Heureka plugin broken access control vulnerability for current patch availability and remediation guidance. The vulnerability affects Heureka plugin versions from n/a through 1.1.0. Administrators should apply the vendor's fixed release as soon as it is available.

Workarounds

Deactivate and remove the Heureka plugin until a fixed version is deployed if the functionality is not business-critical
Deploy a Web Application Firewall rule to block unauthenticated requests to the plugin's known endpoints
Enforce authentication in front of /wp-admin/ using HTTP basic authentication or an identity-aware reverse proxy

bash

# Example nginx rule to block unauthenticated Heureka plugin AJAX actions
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "^heureka_") {
        # Require a valid WordPress logged-in cookie
        if ($http_cookie !~* "wordpress_logged_in_") {
            return 403;
        }
    }
}