CVE-2024-51651: CubeWP Forms Authorization Bypass Flaw

CVE-2024-51651 Overview

CVE-2024-51651 is a missing authorization vulnerability in the CubeWP Forms plugin for WordPress, developed by Imran Tauqeer. The flaw affects all versions up to and including 1.1.10. Attackers can exploit incorrectly configured access control security levels to interact with plugin functionality without proper authorization checks. The vulnerability maps to [CWE-862: Missing Authorization] and is exploitable over the network without authentication or user interaction. Successful exploitation results in a limited integrity impact against affected WordPress installations. Public exploit code has not been observed, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Critical Impact
Unauthenticated attackers can invoke protected CubeWP Forms functionality due to missing capability and authorization checks, leading to limited integrity impact on affected WordPress sites.

Affected Products

CubeWP Forms plugin (cubewp-forms) for WordPress
All versions from n/a through 1.1.10
WordPress sites where the plugin is installed and activated

Discovery Timeline

2025-01-07 - CVE-2024-51651 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-51651

Vulnerability Analysis

The vulnerability stems from broken access control within the CubeWP Forms plugin. One or more plugin actions expose functionality without validating whether the requesting user has the appropriate capability or role. In WordPress plugin development, authorization checks are typically enforced with functions such as current_user_can() alongside nonce verification via check_ajax_referer() or wp_verify_nonce(). When these checks are absent or misconfigured, endpoints intended for privileged users become reachable by lower-privilege or unauthenticated visitors.

An attacker can send crafted HTTP requests directly to the plugin's action handlers. Because authorization is not enforced server-side, the request executes with the privilege level required by the underlying code path rather than the caller's actual permissions. The result is a limited integrity impact, meaning the attacker can modify a subset of data managed by the plugin without triggering confidentiality or availability failures.

Root Cause

The root cause is missing authorization on plugin action endpoints. The code path handling the vulnerable request does not verify the caller's WordPress capability before performing state-changing operations. This is a classic instance of [CWE-862], where security relies on obscurity of an endpoint rather than an explicit permission check.

Attack Vector

Exploitation requires only network access to the target WordPress site. No authentication, privileges, or user interaction are needed. An attacker crafts an HTTP request that targets the exposed CubeWP Forms endpoint and supplies parameters accepted by the handler. The vulnerable handler processes the request as if it originated from an authorized user. Detailed exploitation mechanics are described in the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2024-51651

Indicators of Compromise

Unexpected POST requests to wp-admin/admin-ajax.php or plugin-specific endpoints referencing CubeWP Forms actions from unauthenticated sessions.
Modifications to CubeWP-managed form entries or configuration records that do not correlate with an authenticated administrator session.
Traffic from a single IP or user agent enumerating multiple CubeWP action names in a short time window.

Detection Strategies

Review WordPress access logs for requests to CubeWP Forms action handlers that lack an authenticated session cookie.
Compare plugin version metadata across managed WordPress fleets to identify sites running cubewp-forms at version 1.1.10 or earlier.
Correlate web server logs with WordPress audit logs to identify state changes not attributable to a logged-in administrator.

Monitoring Recommendations

Deploy a Web Application Firewall (WAF) rule that flags unauthenticated requests to CubeWP Forms action endpoints.
Enable a WordPress activity logging plugin to record form and configuration changes with associated user context.
Alert on anomalous request volumes targeting admin-ajax.php with action= parameters referencing CubeWP handlers.

How to Mitigate CVE-2024-51651

Immediate Actions Required

Inventory all WordPress sites and identify installations of the CubeWP Forms plugin at version 1.1.10 or earlier.
Update the plugin to a version later than 1.1.10 as soon as a fixed release is available from the vendor.
Restrict administrative endpoints behind IP allow-lists or a WAF where operationally feasible until patched.

Patch Information

Refer to the Patchstack Vulnerability Advisory for the latest patched release information. Site administrators should apply the vendor-provided update through the WordPress plugin manager and verify the installed version after upgrade.

Workarounds

Deactivate and remove the CubeWP Forms plugin on sites where it is not required.
Apply virtual patching via a WAF rule that blocks unauthenticated access to CubeWP Forms action handlers.
Enforce authentication on admin-ajax.php endpoints using access-control rules at the reverse proxy or WAF layer.

bash

# Example WAF rule concept: block unauthenticated CubeWP Forms actions
# (adapt to your WAF syntax; this is illustrative pseudocode)
if request.uri contains "admin-ajax.php"
   and request.body matches "action=cubewp_"
   and not request.cookie contains "wordpress_logged_in_"
then block