CVE-2024-4320: Remote Code Execution due to LFI in '/install_extension' in parisneo/lollms-webui

A remote code execution (RCE) vulnerability exists in the '/installextension' endpoint of the parisneo/lollms-webui application, specifically within the @router.post("/installextension") route handler. The vulnerability arises due to improper handling of the name parameter in the ExtensionBuilder().buildextension() method, which allows for local file inclusion (LFI) leading to arbitrary code execution. An attacker can exploit this vulnerability by crafting a malicious name parameter that causes the server to load and execute a init.py file from an arbitrary location, such as the upload directory for discussions. This vulnerability affects the latest version of parisneo/lollms-webui and can lead to remote code execution without requiring user interaction, especially when the application is exposed to an external endpoint or operated in headless mode.