CVE-2025-6518

Public Exploit
PySpur-Dev pyspur Jinja2 Template single_llm_call.py SingleLLMCallNode special elements used in a template engine

Description

A vulnerability was found in PySpur-Dev pyspur up to 0.1.18. It has been classified as critical. Affected is the function SingleLLMCallNode of the file backend/pyspur/nodes/llm/single_llm_call.py of the component Jinja2 Template Handler. The manipulation of the argument user_message leads to improper neutralization of special elements used in a template engine. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Category

5.3
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory vuldb.com
Affected: PySpur-Dev pyspur
Published at:
Updated at:

References

Link Tags
https://vuldb.com/?id.313638 technical description vdb entry
https://vuldb.com/?ctiid.313638 permissions required signature
https://vuldb.com/?submit.593612 third party advisory
https://github.com/PySpur-Dev/pyspur/issues/289 issue tracking exploit

Frequently Asked Questions

What is the severity of CVE-2025-6518?
CVE-2025-6518 has been scored as a medium severity vulnerability.
How to fix CVE-2025-6518?
To fix CVE-2025-6518, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-6518 being actively exploited in the wild?
It is possible that CVE-2025-6518 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-6518?
CVE-2025-6518 affects PySpur-Dev pyspur.
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