CVE-2025-6278: Upsonic is vulnerable to Path Traversal attack through its os.path.join function

CVE-2025-6278 · Severity: low · CVSS 3.1 · Published 2025-06-19

A vulnerability classified as critical was found in Upsonic up to 0.55.6. This vulnerability affects the function os.path.join of the file markdown/server.py. The manipulation of the argument file.filename leads to path traversal. The exploit has been disclosed to the public and may be used.

Technologies: upsonic (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-6278 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-6278 being exploited in the wild.
How severe is CVE-2025-6278?
Low severity, with a CVSS score of 3.1, published 19 June 2025.
Which products and versions are affected?
upsonic (PyPI) ECOSYSTEM:introduced=0,fixed=0.56.0.
Is there a fix for CVE-2025-6278?
Yes. upsonic (PyPI): upgrade to 0.56.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-6278?
Check whether you run upsonic (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • upsonic (PyPI): upgrade to 0.56.0 or later
    pip install "upsonic>=0.56.0"

Affected products

  • upsonic (PyPI) ECOSYSTEM:introduced=0,fixed=0.56.0

Identifiers

  • CVE-2025-6278
  • GHSA-8jf4-fcjr-68c2
  • PYSEC-2025-67

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.