CVE-2026-15748Public exploitNetwork attack vector

Remote code execution via forged upload configuration

Published Aug 18, 2026 · Updated Aug 18, 2026

Arbitrary file upload in WPMU DEV Forminator Forms before 1.56.2 allows remote attackers to upload executable files via public forms. A crafted Select-field value can inject a forged Upload record that process_uploads() trusts as field configuration, and handle_file_upload() then accepts ph(p)|text/x-php because the dangerous-extension blocklist removes only exact MIME-map keys. Exposure requires a published form with both Select and File Upload fields; remote code execution follows when uploads land in a custom storage root without the usual .htaccess execution block.

CVSS severity9.8
Critical
EPSS probability4.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in WPMU DEV Forminator Forms before 1.56.2 allows remote attackers to upload executable files via public forms. A crafted Select-field value can inject a forged Upload record that process_uploads() trusts as field configuration, and handle_file_upload() then accepts ph(p)|text/x-php because the dangerous-extension blocklist removes only exact MIME-map keys. Exposure requires a published form with both Select and File Upload fields; remote code execution follows when uploads land in a custom storage root without the usual .htaccess execution block.

The record

CVE
CVE-2026-15748
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
AIOSEO Plugin Team
Product
Forminator Forms
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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 <=1.56.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AIOSEO Plugin Team · Forminator Formsversion=0 <=1.56.1

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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