CVE-2026-14494

Sigma Forms Pro <= 1.4.5 - Unauthenticated Unauthenticated Arbitrary File Upload Leading to Remote Code Execution via Pre-built Template File Upload Field

Published: Aug 29, 2026Updated: Aug 31, 2026 Sources: CVE List NVDCWE-434

9.8CRITICAL

Description

The Sigma Forms Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.4.5 via the handle_form_submission function. This is due to the plugin dynamically granting the unfiltered_upload capability to all users during form submissions and bypassing MIME type validation when allowed_file_types is not configured. This makes it possible for unauthenticated attackers to execute code on the server. Several default pre-built templates including Job Application, Support Ticket, and Wholesale Application have file upload fields with no file type restrictions configured by design, making this vulnerability immediately exploitable upon installation.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-434

Affected Products

bdthemes

commercialaka bd-themes

SigmaForms Pro – AI Generated FormsOn-premWeb App

Web & CMS Plugins / cms-core

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques

Command and Control

Initial Access

Persistence

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References

https://www.wordfence.com/threat-intel/vulnerabilities/id/44d63454-87f0-49e3-ac04-2fa83882500d?source=cve

wordfence.com

https://feedback.bdthemes.com/announcements

feedback.bdthemes.com

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