CVE-2026-1306 midi-Synth <= 1.1.0 - Unauthenticated Arbitrary File Upload via 'export' AJAX Action
Unauthenticated attackers can upload arbitrary files via the export AJAX action, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1306?
CVE-2026-1306 is a critical vulnerability in adminkov midi-Synth, published on 14 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-434
Which versions are affected by CVE-2026-1306?
How do I fix CVE-2026-1306?
No fix has been published for CVE-2026-1306 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1306 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1306 exists.
Public exploit code: 1 Nuclei template and 2 proofs of concept on GitHub.
Sources
Also known as GHSA-6m5f-57jg-w742.