Remote Code Execution Vulnerability in PySpur Jinja2 Template Handler
CVE-2025-6518

5.3MEDIUM

Key Information:

Vendor: Pyspur-dev
Status: Pyspur
Vendor: CVE Published:; 23 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6518?

A vulnerability exists in PySpur's Jinja2 template handling, specifically within the SingleLLMCallNode function of single_llm_call.py. This issue arises from improper neutralization of user-provided inputs, which can be exploited remotely by manipulating the user_message argument. The exposed exploit is publicly available, raising significant concerns for users of the affected versions. Developers are recommended to assess their implementations and apply necessary security measures to prevent potential exploitation.

Affected Version(s)

pyspur 0.1.0

pyspur 0.1.1

pyspur 0.1.2

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-2025-6518 - Proof of Concept

References

https://vuldb.com/?id.313638

vdb-entrytechnical-description

https://vuldb.com/?ctiid.313638

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https://vuldb.com/?submit.593612

third-party-advisory

CVSS V4

Score:

5.3

Severity:

MEDIUM

Confidentiality:

Low

Integrity:

Low

Availability:

Low

Attack Vector:

Network

Attack Complexity:

Low

Attack Required:

None

Privileges Required:

Undefined

User Interaction: