Path Traversal in Upsonic
CVE-2025-6278
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (54.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
- Upsonic
- Upsonic — versions 0.55.0, 0.55.1, 0.55.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Upsonic/Upsonic/issues/356 (issue-tracking, Exploit, exploit)
Frequently asked questions
- What is CVE-2025-6278?
- CVE-2025-6278 is a medium-severity vulnerability in Upsonic, classified under Path Traversal. CVSS score: 5.5/10. Published 2025-06-19.
- How severe is CVE-2025-6278?
- Medium severity. CVSS v3 base score is 5.5 out of 10.