VulnerabilityDeferred

CVE-2026-1306

CRITICAL 9.8EPSS 4.83%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 4.83% probability · 92th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-434
Source: security@wordfence.com

EPSS trend

EPSS 4.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.