Deserialization Flaw in Upsonic's Pickle Handler Functionality
CVE-2025-6279

5.1MEDIUM

Key Information:

Vendor

Upsonic

Status
Upsonic
Vendor
CVE Published:
19 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6279?

A deserialization vulnerability has been identified within the Pickle Handler of the Upsonic product, specifically affecting the cloudpickle.loads function located in the /tools/add_tool file. This vulnerability allows an attacker to manipulate the deserialization process, potentially leading to unauthorized code execution. The issue has been publicly disclosed and poses risks to users of affected versions of the software.

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-2025-6279 - Proof of Concept

References

https://vuldb.com/?id.313283
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313283
signaturepermissions-required
https://vuldb.com/?submit.593099
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-2025-6279 : Deserialization Flaw in Upsonic's Pickle Handler Functionality