CVE-2026-7050: Forms Rb WordPress Auth Bypass Vulnerability

CVE-2026-7050 Overview

CVE-2026-7050 is an authorization bypass vulnerability in the Forms Rb plugin for WordPress affecting all versions up to and including 1.1.9. The plugin fails to verify that an authenticated user is authorized to perform sensitive actions on form data they do not own. Attackers with contributor-level access or higher can read form submission records, modify form configuration options, and delete records belonging to forms owned by other users. The flaw is categorized as Missing Authorization [CWE-862] and is exploitable remotely over the network with low attack complexity.

Critical Impact
Authenticated contributors can read, modify, and delete form data belonging to other site users, leading to data tampering and unauthorized disclosure of form submissions.

Affected Products

WordPress Forms Rb plugin versions 1.1.9 and prior
WordPress sites granting contributor-level (or above) access to untrusted users
All current trunk builds referenced in the plugin repository as of disclosure

Discovery Timeline

2026-05-12 - CVE-2026-7050 published to the National Vulnerability Database
2026-05-12 - Last updated in NVD database

Technical Details for CVE-2026-7050

Vulnerability Analysis

The Forms Rb plugin exposes multiple REST endpoints implemented in app/api.php that handle reading, updating, and deleting form records and configuration. These endpoints check that a request comes from an authenticated WordPress user but do not validate that the user owns, or is permitted to act on, the specific form object referenced in the request. Any user with contributor capabilities can therefore reach the endpoints and submit arbitrary form identifiers belonging to other users.

The missing ownership check turns routine plugin operations into a cross-user data tampering primitive. An attacker can enumerate form identifiers, exfiltrate submission contents, change configuration values such as recipient settings, and remove records to disrupt site operations. Exploitation does not require user interaction and produces no privilege escalation, but it directly undermines the integrity and confidentiality of stored form data.

Root Cause

The root cause is Missing Authorization [CWE-862] in the handlers at app/api.php lines 41, 128, 190, 316, 444, and 623. The functions authenticate the caller but omit a per-object capability check such as a verification that the current user is the form author or holds an appropriate administrative capability. WordPress nonces and is_user_logged_in() style checks alone cannot enforce object-level ownership.

Attack Vector

An attacker first obtains contributor-level credentials, either through legitimate registration on sites that allow it or by compromising an existing low-privileged account. The attacker then sends authenticated HTTP requests to the vulnerable Forms Rb endpoints with form identifiers belonging to other users. The server processes each request without verifying ownership and returns submission data, accepts configuration changes, or deletes records. See the Wordfence Vulnerability Report and the Forms Rb plugin source on WordPress.org for the affected handlers.

Detection Methods for CVE-2026-7050

Indicators of Compromise

Authenticated requests to Forms Rb REST endpoints originating from contributor or author accounts that do not own the referenced form identifiers
Unexpected DELETE or update operations against form submission records in the WordPress database tables created by the plugin
Form configuration changes (such as notification email or redirect targets) that do not correlate with administrator activity

Detection Strategies

Enable WordPress request logging and alert on app/api.php invocations where the authenticated user ID does not match the post_author of the referenced form
Audit the plugin's database tables for submissions, configuration rows, and deletion timestamps that do not align with legitimate workflows
Correlate web access logs with WordPress user roles to identify low-privileged accounts issuing high-volume API calls to the plugin

Monitoring Recommendations

Monitor creation of new contributor or author accounts followed by access to Forms Rb endpoints
Track HTTP 200 responses from plugin endpoints containing form submission payloads delivered to non-administrator sessions
Forward WordPress audit logs to a centralized SIEM or data lake for retention and cross-account correlation

How to Mitigate CVE-2026-7050

Immediate Actions Required

Upgrade the Forms Rb plugin to a version newer than 1.1.9 once the vendor publishes a fix
Review the WordPress user list and remove or downgrade contributor or author accounts that are not strictly required
Audit existing form submissions and configuration entries for unauthorized changes or deletions since the plugin was installed

Patch Information

At the time of NVD publication, all versions up to and including 1.1.9 are affected. Site operators should monitor the Forms Rb plugin repository and the Wordfence advisory for a patched release, and apply it as soon as it becomes available.

Workarounds

Deactivate the Forms Rb plugin until a fixed version is released if contributor-level users cannot be fully trusted
Restrict access to wp-admin and the WordPress REST API at the web server or WAF layer for non-administrator roles
Disable open user registration and require administrator approval for new accounts to reduce the pool of potential attackers

bash

# Example: block REST access to the vulnerable plugin endpoints at the web server
# until an upstream patch is applied (nginx example)
location ~* /wp-content/plugins/forms-rb/app/api\.php$ {
    deny all;
    return 403;
}