CVE-2025-8406: zenml Path Traversal — Exploit & Fix

Description

ZenML version 0.83.1 is affected by a path traversal vulnerability in the `PathMaterializer` class. The `load` function uses `is_path_within_directory` to validate files during `data.tar.gz` extraction, which fails to effectively detect symbolic and hard links. This vulnerability can lead to arbitrary file writes, potentially resulting in arbitrary command execution if critical files are overwritten.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
zenml	zenml	0.83.1 — 0.84.2

References

Advisories & Patches

https://github.com/zenml-io/zenml/commit/5d22a48d7bf6c7f10b748577c2be79cc7969d398

Exploits

https://huntr.com/bounties/a0880d64-9928-45bf-9663-2cd81582d9e7 https://huntr.com/bounties/a0880d64-9928-45bf-9663-2cd81582d9e7

Frequently Asked Questions

What is CVE-2025-8406? +

ZenML version 0.83.1 is affected by a path traversal vulnerability in the `PathMaterializer` class. The `load` function uses `is_path_within_directory` to validate files during `data.tar.gz` extraction, which fails to effectively detect symbolic and hard links. This vulnerability can lead to arbitrary file writes, potentially resulting in arbitrary command execution if critical files are overwritten. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-8406? +

CVE-2025-8406 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-8406? +

CVE-2025-8406 affects products from zenml, specifically: zenml. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-8406? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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