CVE-2026-25012: WP Bannerize Pro Auth Bypass Vulnerability

CVE-2026-25012 Overview

CVE-2026-25012 is a Missing Authorization vulnerability [CWE-862] in the gfazioli WP Bannerize Pro WordPress plugin. The flaw affects all versions up to and including 1.11.0. Attackers can exploit incorrectly configured access control security levels to interact with plugin functionality that should require authentication or higher privileges. The vulnerability is remotely exploitable over the network without authentication or user interaction, but its impact is limited to low confidentiality exposure with no integrity or availability impact.

Critical Impact

Unauthenticated remote attackers can access protected functionality in WP Bannerize Pro through broken access control, potentially exposing limited confidential data on affected WordPress sites.

Affected Products

• gfazioli WP Bannerize Pro WordPress plugin
• All versions from n/a through 1.11.0
• WordPress installations using the wp-bannerize-pro plugin

Discovery Timeline

• 2026-02-03 - CVE-2026-25012 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2026-25012

Vulnerability Analysis

The vulnerability stems from missing authorization checks in the WP Bannerize Pro plugin. Plugin endpoints or actions fail to verify whether the requesting user has the required capability or role before executing privileged operations. This category of flaw, tracked under CWE-862, commonly appears in WordPress plugins when developers rely on action hooks without invoking current_user_can() or equivalent capability checks.

An attacker sends crafted HTTP requests to the plugin's exposed actions or REST routes. Because the plugin does not validate the caller's permissions, the server processes the request as if it were authorized. The attack vector is network-based with low complexity and requires no privileges or user interaction.

The impact is scoped to confidentiality. Successful exploitation may reveal banner configuration data, plugin settings, or other limited information that should be restricted to administrators. Integrity and availability remain unaffected, so attackers cannot modify content or disrupt service through this specific weakness.

Root Cause

The root cause is broken access control. The plugin registers handlers that perform sensitive read operations without enforcing capability validation. Authorization decisions rely on implicit assumptions rather than explicit checks against the WordPress capabilities API.

Attack Vector

Exploitation occurs over HTTP or HTTPS against the WordPress installation. The attacker issues unauthenticated requests to vulnerable plugin endpoints. No social engineering or prior account access is required. See the Patchstack advisory for technical details.

Detection Methods for CVE-2026-25012

Indicators of Compromise

• Unauthenticated HTTP requests to wp-admin/admin-ajax.php referencing wp-bannerize-pro actions
• Unexpected access to plugin REST routes under /wp-json/ from unauthenticated sources
• Anomalous traffic patterns targeting the wp-bannerize-pro plugin path from a single source IP

Detection Strategies

• Inspect web server access logs for repeated requests to plugin endpoints originating from unauthenticated sessions
• Deploy a web application firewall rule that flags access to wp-bannerize-pro AJAX or REST actions without a valid nonce or authentication cookie
• Correlate WordPress audit logs with HTTP request logs to identify privileged operations executed without a logged-in user

Monitoring Recommendations

• Enable verbose logging on the WordPress site and forward logs to a centralized SIEM for correlation
• Monitor for spikes in admin-ajax.php traffic referencing the plugin slug wp-bannerize-pro
• Track plugin version inventory across WordPress fleets to identify hosts running 1.11.0 or earlier

How to Mitigate CVE-2026-25012

Immediate Actions Required

• Update WP Bannerize Pro to a version later than 1.11.0 once the vendor publishes a fix
• Audit WordPress sites for installations of wp-bannerize-pro and prioritize patching
• Restrict access to admin-ajax.php and plugin REST routes through a web application firewall

Patch Information

At the time of publication, the vendor advisory is tracked through the Patchstack database. Administrators should monitor the WordPress plugin repository for an updated release of wp-bannerize-pro that introduces proper capability checks. Apply the update immediately upon availability and verify the installed version after deployment.

Workarounds

• Deactivate the WP Bannerize Pro plugin until a patched version is installed
• Apply virtual patching through a web application firewall to block unauthenticated requests to plugin endpoints
• Restrict access to the WordPress site by IP allowlisting for administrative paths where feasible