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CVE-2021-21307 is a critical unauthenticated remote code execution vulnerability in the Lucee Admin interface, affecting Lucee Server versions prior to 5.3.5.96, 5.3.6.68, and 5.3.7.47. The vulnerability arises from a combination of logic flaws and misconfigurations in the admin panel, including unauthenticated access to sensitive CFM files, a path traversal in imgProcess.cfm, and an unauthenticated file upload flaw in ext.applications.upload.cfm. These issues can be chained to allow an attacker to upload and execute arbitrary code on the server without authentication, as demonstrated in real-world attacks against high-profile targets.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module targeting CVE-2021-21307, an arbitrary file write vulnerability in the Lucee Administrator's imgProcess.cfm endpoint. The exploit leverages directory traversal to write a malicious CFML file to a web-accessible location, then executes arbitrary OS commands as the Tomcat user. The module supports both command execution (reverse shell) and binary dropper payloads (Meterpreter). The default target path is /lucee/admin/imgProcess.cfm, and the exploit is operational against Linux/Unix platforms. The code includes cleanup routines for artifacts and logs, and provides options for payload selection and command execution timeout. The repository is structured as a single Ruby file compatible with the Metasploit framework, and is intended for use by penetration testers to gain remote code execution on vulnerable Lucee installations.
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