CVE-2025-54717: WP Membership Authorization Bypass Flaw

CVE-2025-54717 Overview

CVE-2025-54717 is a Missing Authorization vulnerability [CWE-862] in the e-plugins WP Membership plugin for WordPress. The flaw affects all versions up to and including 1.6.3. Attackers with low-privilege authenticated access can exploit incorrectly configured access control security levels to change plugin settings they should not reach.

The vulnerability stems from missing capability checks on privileged plugin actions. An authenticated subscriber-level account can therefore invoke administrative settings changes and alter membership-related configuration on the site.

Critical Impact
Authenticated low-privilege users can modify WP Membership plugin settings, undermining membership access controls and site integrity.

Affected Products

e-plugins WP Membership WordPress plugin (wp-membership)
All versions from n/a through 1.6.3
WordPress sites using the affected plugin with open user registration

Discovery Timeline

2025-08-14 - CVE-2025-54717 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54717

Vulnerability Analysis

The vulnerability is a Missing Authorization weakness [CWE-862] in the WP Membership plugin. Privileged plugin endpoints do not verify whether the calling user holds the required WordPress capability. Any authenticated user, including a default subscriber, can send crafted requests to those endpoints and modify plugin settings.

The attack is network-reachable and requires low privileges without user interaction. Successful exploitation affects the integrity and availability of plugin-controlled functionality. Confidentiality impact is not indicated in the advisory. Because WP Membership governs paid or gated content, unauthorized settings changes can weaken membership enforcement across the site.

Root Cause

The root cause is the absence of proper capability or nonce validation on settings-related handlers within the plugin. WordPress plugins are expected to gate administrative actions using functions such as current_user_can() and check_admin_referer(). In WP Membership <= 1.6.3, one or more of these checks are missing or misconfigured, allowing low-privilege accounts to reach settings logic reserved for administrators.

Attack Vector

An attacker first obtains any authenticated session on the target site, for example by registering as a subscriber where open registration is enabled. The attacker then sends an HTTP request to the vulnerable WP Membership endpoint that handles settings updates. Because the endpoint does not enforce administrator-level authorization, the plugin accepts the request and persists the modified configuration. Full exploitation details are documented in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-54717

Indicators of Compromise

Unexpected changes to WP Membership plugin settings recorded in the wp_options table or plugin-specific tables
POST requests to WP Membership admin-ajax or admin-post handlers originating from non-administrator user sessions
New or altered membership tiers, access rules, or payment configuration without a corresponding administrator audit trail

Detection Strategies

Review WordPress audit logs for settings changes performed by users without the manage_options capability
Correlate HTTP access logs against WordPress user roles to identify low-privilege accounts hitting plugin admin endpoints
Compare current WP Membership configuration against a known-good baseline to detect unauthorized modifications

Monitoring Recommendations

Enable a WordPress activity logging plugin to record settings updates and role-based actions
Alert on any settings change events performed by subscriber or customer accounts
Monitor the site for the deployment of WP Membership versions <= 1.6.3 across managed WordPress environments

How to Mitigate CVE-2025-54717

Immediate Actions Required

Update the WP Membership plugin to a version later than 1.6.3 as soon as the vendor releases a patched build
Audit existing WordPress user accounts and remove unused low-privilege accounts that could be abused
Review WP Membership settings for unauthorized modifications and restore validated values

Patch Information

The advisory identifies WP Membership versions up to and including 1.6.3 as vulnerable. Administrators should consult the Patchstack Vulnerability Report for the current fixed version and apply the vendor-supplied update through the WordPress plugin manager.

Workarounds

Disable the WP Membership plugin until a patched version is installed if the site can operate without it
Disable open user registration or restrict the default new user role to reduce the pool of low-privilege attackers
Apply web application firewall rules that block unauthenticated or non-admin requests to WP Membership settings endpoints

bash

# Example: disable open registration and enforce subscriber default via wp-cli
wp option update users_can_register 0
wp option update default_role subscriber