EIP-2026-100666

PRE-CVE

Umbraco CMS 7.12.4 - Remote Code Execution (Authenticated)

Title source: legacy

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-100666. PoCs published by Alexandre ZANNI.

AI-analyzed exploit summary This exploit leverages an authenticated XSLT injection vulnerability in Umbraco CMS 7.12.4 to achieve remote code execution. It authenticates, crafts a malicious XSLT payload with embedded C# code, and submits it to the vulnerable endpoint to execute arbitrary commands.

Description

Umbraco CMS 7.12.4 - Remote Code Execution (Authenticated)

Exploits (1)

exploitdb WORKING POC

by Alexandre ZANNI · pythonwebappsaspx

https://www.exploit-db.com/exploits/49488

View Code ZIP pw:eip

This exploit leverages an authenticated XSLT injection vulnerability in Umbraco CMS 7.12.4 to achieve remote code execution. It authenticates, crafts a malicious XSLT payload with embedded C# code, and submits it to the vulnerable endpoint to execute arbitrary commands.

Classification

Working Poc 100%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: Umbraco CMS 7.12.4

Auth required

Prerequisites: Valid Umbraco CMS credentials · Access to the Umbraco backoffice

MITRE ATT&CK

T1220 - XSL Script Processing T1059 - Command and Scripting Interpreter

devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve

Tracked Since Feb 18, 2026