CVE-2026-14494Network attack vector

Unauthenticated code execution via unrestricted form uploads

Published Aug 29, 2026 · Updated Aug 29, 2026

Unrestricted file upload in BdThemes Sigma Forms Pro 1.4.5 and earlier allows remote attackers to execute code through form submissions. The handle_form_submission function grants unfiltered_upload to every submitter and skips MIME validation when allowed_file_types is unset. Default Job Application, Support Ticket, and Wholesale Application templates meet that condition, exposing code execution without authentication.

CVSS severity9.8
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in BdThemes Sigma Forms Pro 1.4.5 and earlier allows remote attackers to execute code through form submissions. The handle_form_submission function grants unfiltered_upload to every submitter and skips MIME validation when allowed_file_types is unset. Default Job Application, Support Ticket, and Wholesale Application templates meet that condition, exposing code execution without authentication.

The record

CVE
CVE-2026-14494
Published
Aug 29, 2026
Updated
Aug 29, 2026
Vendor
BdThemes
Product
Sigma Forms
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BdThemes · Sigma Formsversion=0 <=1.4.5

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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