CVE-2026-1306

CRITICAL NUCLEI

Midi-Synth <1.1.0 - Unauthenticated RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 4 public exploits for CVE-2026-1306. PoCs published by XiaomingX, adminlove520, richardpaimu34. A Nuclei detection template is also available.

AI-analyzed exploit summary The repository lacks actual exploit code and instead redirects to an external download link (tinyurl.com). The README contains vague marketing language ('detection evasion', 'proxy support') without technical details about the 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.

Exploits (4)

github SUSPICIOUS 10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-1306

The repository lacks actual exploit code and instead redirects to an external download link (tinyurl.com). The README contains vague marketing language ('detection evasion', 'proxy support') without technical details about the vulnerability.

Classification
Suspicious 95%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: unspecified
No auth needed
Prerequisites: none specified
devstral-2 · analyzed Feb 27, 2026 Full analysis →
github WORKING POC 4 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2026/CVE-2026-1306

This repository contains a functional Python exploit for CVE-2026-1306, targeting the midi-Synth WordPress plugin. The exploit leverages an improper file type validation in the 'export' AJAX action to upload a malicious PHP shell, which is left on the server due to a cleanup failure when the API key validation fails.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: midi-Synth WordPress plugin (≤ 1.1.0)
No auth needed
Prerequisites: Target must have the midi-Synth plugin installed · A page with the [midiSynth] shortcode must be accessible to fetch the nonce
devstral-2 · analyzed May 17, 2026 Full analysis →
nomisec SUSPICIOUS 2 stars
by richardpaimu34 · poc
https://github.com/richardpaimu34/CVE-2026-1306

The repository lacks actual exploit code and instead redirects to an external download link (tinyurl.com). The README provides vague details about the exploit chain without technical depth, which is characteristic of social engineering lures.

Classification
Suspicious 95%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: unspecified
No auth needed
devstral-2 · analyzed Feb 18, 2026 Full analysis →
github WORKING POC
by murrez · pythonpoc
https://github.com/murrez/CVE-2026-1306

This repository contains a functional Python exploit for CVE-2026-1306, targeting the midi-Synth WordPress plugin. The exploit automates the extraction of a nonce from pages containing the [midiSynth] shortcode and leverages an insecure file upload vulnerability in the 'export' AJAX action to upload a malicious PHP shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: midi-Synth WordPress plugin (≤ 1.1.0)
No auth needed
Prerequisites: Target must have the midi-Synth plugin installed · A page with the [midiSynth] shortcode must be accessible to extract the nonce
devstral-2 · analyzed Apr 28, 2026 Full analysis →

Nuclei Templates (1)

WordPress midi-Synth <= 1.1.0 - Unauthenticated Arbitrary File Upload
CRITICALVERIFIEDby pussycat0x

Scores

CVSS v3 9.8
EPSS 0.3145
EPSS Percentile 96.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-434
Status published
Products (1)
adminkov/midi-Synth < 1.1.0
Published Feb 14, 2026
Tracked Since Feb 18, 2026