CVE-2021-43831 Files on the host computer can be accessed from the Gradio interface
Attackers can access arbitrary files on the host computer via Gradio interfaces due to unrestricted file paths, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43831?
CVE-2021-43831 is a high-severity path traversal vulnerability in Gradio Project Gradio, published on 15 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Gradio is an open source framework for building interactive machine learning models and demos. In versions prior to 2.5.0 there is a vulnerability that affects anyone who creates and publicly shares Gradio interfaces. File paths are not restricted and users who receive a Gradio link can access any files on the host computer if they know the file names or file paths. This is limited only by the host operating system. Paths are opened in read only mode. The problem has been patched in gradio 2.5.0.
Weakness: CWE-22
Which versions are affected by CVE-2021-43831?
3 open source packages ship an affected version, including gradio. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gradio PyPI | All versions | 2.5.0 |
gradio PyPI | All versions | 2.5.0 |
gradio PyPI | All versions | 2.5.0 |
Products include Gradio Project Gradio.
How do I fix CVE-2021-43831?
Upgrade gradio to 2.5.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-43831 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-43831 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Gradio Project Gradio
- CVE-2024-39236 Withdrawn Advisory: Gradio was discovered to contain a code injection vulnerability via the component /gradio/component_meta.py
- CVE-2023-6572 Command Injection in gradio-app/gradio
- CVE-2022-24770 Improper Neutralization of Formula Elements in a CSV File in Gradio Flagging
- CVE-2026-49119 Gradio < 6.16.0 Path Traversal via FileExplorer.preprocess()
- CVE-2025-23042 Gradio Blocked Path ACL Bypass Vulnerability
Sources
Also known as GHSA-rhq2-3vr9-6mcr, PYSEC-2021-873.