CVE-2025-52721: Global Gallery Auth Bypass Vulnerability

CVE-2025-52721 Overview

CVE-2025-52721 is a Missing Authorization vulnerability [CWE-862] in the LCweb Global Gallery plugin for WordPress. The flaw affects all versions up to and including 9.2.3. Attackers can exploit incorrectly configured access control security levels to reach functionality that should require higher privileges. The issue is exploitable over the network without user interaction and without prior authentication credentials. Successful exploitation results in limited confidentiality and integrity impact on affected WordPress installations.

Critical Impact
Unauthenticated network attackers can bypass access controls in Global Gallery <= 9.2.3, exposing plugin functionality and data intended for privileged users.

Affected Products

LCweb Global Gallery WordPress plugin, versions up to and including 9.2.3
WordPress sites running the plugin with default access control configuration
Any hosting environment exposing the vulnerable plugin endpoints to the public internet

Discovery Timeline

2025-08-14 - CVE-2025-52721 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-52721

Vulnerability Analysis

The vulnerability is a Broken Access Control issue classified under [CWE-862] Missing Authorization. Global Gallery exposes plugin actions that do not verify whether the requesting user holds the required capability or role. As a result, requests that should be limited to administrators or authenticated editors are accepted from lower-privileged contexts. The attack vector is Network based, requires low complexity, and does not require user interaction. Impact is limited to confidentiality and integrity of plugin-managed data. Availability of the WordPress host is not directly affected by this flaw, according to the published CVSS vector.

Root Cause

The root cause is missing or incorrectly configured authorization checks on one or more plugin handlers. WordPress plugins typically enforce authorization using current_user_can() capability checks combined with nonce validation on AJAX or REST endpoints. In Global Gallery <= 9.2.3, these checks are either absent or scoped to a security level that does not match the sensitivity of the underlying action. This allows requests from unauthenticated or lower-privileged principals to invoke restricted functionality.

Attack Vector

An attacker sends crafted HTTP requests to the plugin's exposed endpoints on a WordPress site running a vulnerable version. Because no authentication is required and the endpoint accepts the request without a proper capability check, the attacker can read or modify plugin resources such as gallery configurations or associated metadata. Refer to the Patchstack Vulnerability Advisory for endpoint-specific technical details.

Detection Methods for CVE-2025-52721

Indicators of Compromise

Unauthenticated HTTP POST or GET requests targeting Global Gallery admin-ajax.php actions or REST routes from unusual source IPs
Unexpected modifications to gallery entries, media metadata, or plugin options in the WordPress database
Access log entries showing repeated requests to plugin endpoints without a valid session cookie or X-WP-Nonce header

Detection Strategies

Inventory WordPress installations and identify hosts running Global Gallery version 9.2.3 or earlier
Review web server access logs for requests to Global Gallery action handlers originating from unauthenticated sessions
Compare current plugin settings and gallery content against known-good backups to detect unauthorized changes

Monitoring Recommendations

Alert on HTTP 200 responses to plugin endpoints when the request lacks authentication cookies or valid nonces
Monitor WordPress audit logs for gallery create, update, or delete events performed outside expected administrative sessions
Track spikes in traffic to /wp-admin/admin-ajax.php referencing Global Gallery actions

How to Mitigate CVE-2025-52721

Immediate Actions Required

Update Global Gallery to a version later than 9.2.3 as soon as the vendor releases a fixed build
Restrict access to /wp-admin/ and plugin AJAX endpoints using a Web Application Firewall (WAF) or IP allow-listing
Audit user accounts and plugin configuration for unauthorized changes made prior to patching

Patch Information

At the time of NVD publication, the advisory lists all versions from n/a through 9.2.3 as affected. Administrators should consult the Patchstack Vulnerability Advisory for the current fixed version and apply it through the WordPress plugin update mechanism.

Workarounds

Deactivate and remove the Global Gallery plugin until a patched version is installed
Deploy WAF rules that block unauthenticated requests to Global Gallery admin-ajax.php actions and REST routes
Enforce authentication in front of /wp-admin/ using HTTP basic authentication or a reverse proxy

bash

# Example: block unauthenticated Global Gallery AJAX actions at the web server
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "^gg_") {
        # Require a valid WordPress logged-in cookie
        if ($http_cookie !~* "wordpress_logged_in_") {
            return 403;
        }
    }
}