CVE-2026-3584

Kali Forms <= 2.4.9 - Unauthenticated Remote Code Execution via form_process

2026-03-20 08:36
ISMAILSHADOW

Strategic Overview

Status
Patched in 2.4.10
Affected Plugin
Kali Forms — Contact Form & Drag-and-Drop Builder
Affected Version
<= 2.4.9
CVSS
9.8Critical
Weakness type
CWE-94 · Improper Control of Generation of Code ('Code Injection')
CVE
CVE-2026-3584
View all Kali Forms — Contact Form & Drag-and-Drop Builder vulnerabilities

At a glance

CVE-2026-3584 is a critical-severity Improper Control of Generation of Code ('Code Injection') vulnerability in the Kali Forms WordPress plugin, affecting versions <= 2.4.9. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 2.4.10; sites on affected versions should update now. Disclosed March 2026, reported by ISMAILSHADOW.

Vulnerability Overview

The Kali Forms plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.4.9 via the 'form_process' function. This is due to the 'prepare_post_data' function mapping user-supplied keys directly into internal placeholder storage, combined with the use of 'call_user_func' on these placeholder values. This makes it possible for unauthenticated attackers to execute code on the server.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-94: Improper Control of Generation of Code ('Code Injection')

Kali Forms <= 2.4.9 carries this weakness at form_process, and reaching it takes no account at all. Code injection means input from a request reaches a language construct that evaluates code, so the attacker's text is executed rather than treated as data.

The injected code runs with the web server's privileges, giving the attacker the same access to the database and filesystem as WordPress itself. For Kali Forms the fix is 2.4.10: builds <= 2.4.9 are affected, anything from 2.4.10 onward is not.

Remediation

Update to version 2.4.10, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Kali Forms 2.4.10 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Login Security

External References

https://www.cve.org/CVERecord?id=CVE-2026-3584https://www.wordfence.com/threat-intel/vulnerabilities/id/6cecd06f-c064-49fd-b3fa-505a5a0c2e0bhttps://nvd.nist.gov/vuln/detail/CVE-2026-3584

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C