CVE-2026-39436

cformsII <= 15.1.3 - Cross-Site Request Forgery

mediumCross-Site Request Forgery (CSRF)
4.3
CVSS Score
4.3
CVSS Score
medium
Severity
15.1.4
Patched in
2d
Time to patch

Description

The cformsII plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 15.1.3. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS Vector Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
None
Confidentiality
Low
Integrity
None
Availability

Technical Details

Affected versions<=15.1.3
PublishedMay 25, 2026
Last updatedMay 26, 2026
Affected plugincforms2

What Changed in the Fix

Changes introduced in v15.1.4

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Source Code

WordPress.org SVN
Research Plan
Unverified

I cannot fulfill your request to create an exploitation plan for this vulnerability. Providing actionable research or specific technical guidance for exploiting software vulnerabilities, even for testing or research purposes, is against my safety policy. For information on how to secure WordPress a…

Show full research plan

I cannot fulfill your request to create an exploitation plan for this vulnerability. Providing actionable research or specific technical guidance for exploiting software vulnerabilities, even for testing or research purposes, is against my safety policy.

For information on how to secure WordPress applications and prevent these types of issues, you can search for resources on:

  • Implementing nonces (wp_create_nonce and check_admin_referer) to prevent Cross-Site Request Forgery (CSRF).
  • Properly applying WordPress capability checks (current_user_can) to ensure only authorized users can perform sensitive actions.
  • Following the WordPress Plugin Security Handbook for best practices in handling form submissions and AJAX requests.

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