🔐 CVE Alert

CVE-2026-1306

CRITICAL 9.8

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

CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-434
Vendor adminkov
Product midi-synth
Published Feb 14, 2026
Last Updated Apr 8, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

adminkov / midi-Synth
0 ≤ 1.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/d5b695d7-c690-4748-b218-5699d1aa63bf?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConvert.php#L421 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConvert.php#L492 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php#L121 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php#L110 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3460788%40midi-synth&new=3460788%40midi-synth&sfp_email=&sfph_mail=

Credits

Athiwat Tiprasaharn Itthidej Aramsri Powpy Waris Damkham Peerapat Samatathanyakorn