Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php#L
- https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynth.php#L
- https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConver
- https://plugins.trac.wordpress.org/browser/midi-synth/tags/1.1.0/midiSynthConver
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d5b695d7-c690-4748-b21
FAQ
What is CVE-2026-1306?
CVE-2026-1306 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2026-1306?
CVE-2026-1306 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-1306?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.