Path Traversal Vulnerability in Upsonic File Handling
CVE-2025-6278

5.1MEDIUM

Key Information:

Vendor

Upsonic

Status
Upsonic
Vendor
CVE Published:
19 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6278?

A significant path traversal vulnerability has been identified in the Upsonic application, specifically impacting versions up to 0.55.6. The vulnerability arises from improper handling of file paths in the function os.path.join within markdown/server.py. This flaw allows an attacker to manipulate the file.filename argument, potentially leading to unauthorized access to the server's filesystem. Given its public disclosure, immediate action is recommended to mitigate potential exploitation. For detailed technical analysis, refer to the relevant advisories and issue tracking links.

Affected Version(s)

Upsonic 0.55.0

Upsonic 0.55.1

Upsonic 0.55.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6278 - Proof of Concept

References

https://vuldb.com/?id.313282
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313282
signaturepermissions-required
https://vuldb.com/?submit.593096
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-6278 : Path Traversal Vulnerability in Upsonic File Handling