midi-Synth <= 1.1.0 - Unauthenticated Arbitrary File Upload via 'export' AJAX Action

Unrestricted Upload of File with Dangerous Type
CVE CVE-2026-1306
CVSS Critical (9.8)
Publicly Published February 13, 2026
Last Updated February 24, 2026
Researcher Athiwat Tiprasaharn (Jitlada), Itthidej Aramsri (Boeing777), Powpy, Waris Damkham, Peerapat Samatathanyakorn
Description

The midi-Synth plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type and file extension validation in the 'export' AJAX action in all versions up to, and including, 1.1.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible granted the attacker can obtain a valid nonce. The nonce is exposed in frontend JavaScript making it trivially accessible to unauthenticated attackers.

References

1 affected software package

Software Type Plugin
Software Slug midi-synth (view on wordpress.org)
Patched? No
Affected Version
  • <= 1.1.0
Patched Version
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