CVE-2025-12535 MEDIUM

CVE-2025-12535: SureForms <= 1.13.1 - Cross-Site Request Forgery Protection Bypass via Improper Nonce Distribution

Vendor Brainstormforce
Product SureForms – Contact Form, Payment Form & Other Custom Form Builder
Weakness CWE-352 · CSRF
Published November 19, 2025
Last update April 8, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

The SureForms plugin for WordPress is vulnerable to Cross-Site Request Forgery Bypass in all versions up to, and including, 1.13.1. This is due to the plugin distributing generic WordPress REST API nonces (wp_rest) to unauthenticated users via the 'wp_ajax_nopriv_rest-nonce' action. While the plugin legitimately needs to support unauthenticated form submissions, it incorrectly uses generic REST nonces instead of form-specific nonces. This makes it possible for unauthenticated attackers to bypass CSRF protection on REST API endpoints that rely solely on nonce verification without additional authentication checks, allowing them to trigger unauthorized actions such as the plugin's own post-submission hooks and potentially other plugins' REST endpoints.

Explanation of Vulnerability in Simple Terms

02Summary

SureForms versions up to 1.13.1 lack CSRF (cross-site request forgery) protections on certain actions. An attacker can craft a malicious webpage that, when visited by a logged-in site admin, performs unwanted form modifications or settings changes without the admin's knowledge. The vulnerability requires no special privileges and affects the form builder's integrity.

What an attacker can do

03Attacker Capabilities

Trick a logged-in admin into modifying form settings or data without their consent via a malicious webpage.

Potential impact on your site

04Site Impact

Form configurations could be altered or deleted by attackers without your knowledge or approval.

Conditions required to exploit

05Prerequisites

Admin must visit attacker's webpage while logged into the WordPress site.

Key dates

06Disclosure timeline

November 19, 2025 CVE published
April 8, 2026 Record updated