FastGPT < 4.9.11 - Sandbox Escape and Arbitrary File Write via Overly Permissive Syscalls
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2025-49131. PoCs published by Wenura17125.
AI-analyzed exploit summary This repository contains a functional exploit PoC for CVE-2025-49131, a sandbox escape vulnerability in FastGPT's fastgpt-sandbox container. The exploit demonstrates file read/write, import bypass, and potential RCE capabilities through Python builtins manipulation.
Description
FastGPT is an open-source project that provides a platform for building, deploying, and operating AI-driven workflows and conversational agents. The Sandbox container (fastgpt-sandbox) is a specialized, isolated environment used by FastGPT to safely execute user-submitted or dynamically generated code in isolation. The sandbox before version 4.9.11 has insufficient isolation and inadequate restrictions on code execution by allowing overly permissive syscalls, which allows attackers to escape the intended sandbox boundaries. Attackers could exploit this to read and overwrite arbitrary files and bypass Python module import restrictions. This is patched in version 4.9.11 by restricting the allowed system calls to a safer subset and additional descriptive error messaging.
Exploits (1)
This repository contains a functional exploit PoC for CVE-2025-49131, a sandbox escape vulnerability in FastGPT's fastgpt-sandbox container. The exploit demonstrates file read/write, import bypass, and potential RCE capabilities through Python builtins manipulation.
References (5)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L