CVE-2025-6278

Name: CVE-2025-6278
Creator: NVD / NIST
Published: 2025-06-19T21:15:27.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2025-6278 is a low-severity vulnerability rated 2/10 on the CVSS scale. 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. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

2/10

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.65%

46.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Upsonic	Upsonic	<= 0.55.6

References

https://github.com/Upsonic/Upsonic/issues/356Exploit
https://vuldb.com/?ctiid.313282Permissions Required, VDB Entry
https://vuldb.com/?id.313282Third Party Advisory, VDB Entry
https://vuldb.com/?submit.593096Third Party Advisory, VDB Entry
https://github.com/Upsonic/Upsonic/issues/356Exploit

Timeline

Published: Jun 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-6278?

How severe is CVE-2025-6278?

CVE-2025-6278 has a CVSS score of 2/10 (LOW severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2025-6278?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-6278?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST