CVE-2026-59546: Hide My WP Ghost Auth Bypass Vulnerability

CVE-2026-59546 Overview

CVE-2026-59546 is a broken authentication vulnerability in the Hide My WP Ghost WordPress plugin affecting versions up to and including 7.0.06. The flaw allows a subscriber-level authenticated user to bypass the plugin's two-factor authentication (2FA) mechanism. The issue is classified as [CWE-639]: Authorization Bypass Through User-Controlled Key. Patchstack tracks this as a 2FA bypass affecting the plugin's account protection features. The vulnerability enables horizontal privilege escalation by allowing an attacker with low-privilege credentials to circumvent the additional authentication step intended to protect other accounts.

Critical Impact
An authenticated subscriber can bypass 2FA protections in Hide My WP Ghost, undermining the plugin's core account-hardening functionality and exposing higher-privileged accounts to compromise.

Affected Products

Hide My WP Ghost WordPress plugin, versions <= 7.0.06
WordPress sites relying on Hide My WP Ghost for 2FA enforcement
Deployments where subscriber-level registration is enabled

Discovery Timeline

2026-07-27 - CVE-2026-59546 published to NVD
2026-07-27 - Last updated in NVD database

Technical Details for CVE-2026-59546

Vulnerability Analysis

The vulnerability resides in the 2FA verification logic of Hide My WP Ghost <= 7.0.06. An authenticated subscriber can manipulate a user-controlled identifier during the authentication flow to bypass the second-factor challenge. Because the plugin trusts a client-supplied key rather than a server-side session binding, the check fails to enforce that the 2FA challenge corresponds to the correct account.

Exploitation requires network access and valid subscriber credentials. Attack complexity is elevated because the attacker must interact with the authentication flow in a specific sequence, but no user interaction from the victim is required. Successful exploitation impacts confidentiality and integrity by granting access to protected account state that 2FA was intended to guard.

The EPSS score is 0.361% (percentile 28.79), indicating low near-term exploitation probability at time of publication. However, the plugin's install base and the low privilege requirement make this a meaningful concern for WordPress operators.

Root Cause

The root cause is authorization bypass through a user-controlled key [CWE-639]. The 2FA verification routine relies on a request parameter that the caller can modify, rather than deriving the target account from a server-side session. This allows a subscriber to point the 2FA validation at a different account context and bypass the intended challenge.

Attack Vector

The attack vector is network-based. An attacker registers or obtains a subscriber account, authenticates to the target WordPress site, and issues crafted requests against the plugin's 2FA endpoint. By tampering with the user-controlled identifier in the 2FA workflow, the attacker skips the second-factor requirement. See the Patchstack Vulnerability Report for the disclosed technical description.

No verified proof-of-concept code has been published for CVE-2026-59546.
Refer to the Patchstack advisory for technical specifics.

Detection Methods for CVE-2026-59546

Indicators of Compromise

Repeated 2FA verification requests from a single authenticated subscriber against multiple user identifiers.
Successful WordPress logins that skip the expected 2FA challenge step in plugin logs.
Unusual account activity from subscriber-role accounts accessing endpoints or content outside their role.

Detection Strategies

Review Hide My WP Ghost 2FA logs for verification events where the request-supplied user identifier does not match the session user.
Correlate WordPress wp-login.php and REST API authentication events to find sessions that completed login without a corresponding 2FA success record.
Alert on subscriber accounts that transition into administrative areas or trigger privilege-sensitive actions shortly after login.

Monitoring Recommendations

Ingest WordPress access logs and plugin audit logs into a centralized log platform for correlation.
Baseline normal 2FA challenge-to-success ratios per user and alert on deviations.
Monitor for anomalous parameter tampering patterns on plugin endpoints handling authentication.

How to Mitigate CVE-2026-59546

Immediate Actions Required

Upgrade Hide My WP Ghost to a version later than 7.0.06 as soon as the vendor-fixed release is available per the Patchstack advisory.
Audit existing subscriber-level accounts and remove or disable any that are unrecognized.
Force password resets and re-enrollment of 2FA for administrative and editor accounts on affected sites.

Patch Information

The vulnerability affects Hide My WP Ghost <= 7.0.06. Administrators should apply the fixed release identified in the Patchstack Vulnerability Report. Verify the installed version in the WordPress plugins dashboard after updating.

Workarounds

Disable open user registration on the WordPress site until the plugin is patched to reduce the pool of low-privilege attackers.
Temporarily disable the Hide My WP Ghost 2FA feature and rely on an alternate, unaffected 2FA plugin.
Restrict access to wp-admin and authentication endpoints by IP allowlist or web application firewall rules where feasible.

bash

# Configuration example: restrict wp-login.php via nginx
location = /wp-login.php {
    allow 203.0.113.0/24;
    deny all;
    include fastcgi_params;
    fastcgi_pass unix:/var/run/php-fpm.sock;
}