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

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Summary

CVECVE-2026-1306
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-14 07:16:10 UTC
Updated2026-04-08 19:25:02 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.153260000 probability, percentile 0.946360000 (date 2026-04-13)

Problem Types: CWE-434 | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Adminkov Midi-Synth affected 1.1.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConvert.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConvert.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/d5b695d7-c690-4748-b218-5699d... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Athiwat Tiprasaharn (en)

CNA: Itthidej Aramsri (en)

CNA: Powpy (en)

CNA: Waris Damkham (en)

CNA: Peerapat Samatathanyakorn (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-02-20T21:14:59.000ZVendor Notified
CNA2026-02-13T18:33:05.000ZDisclosed
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