CVE-2020-36941

Name: CVE-2020-36941
Creator: NVD / NIST
Published: 2026-01-27T16:16:11.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2020-36941 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Knockpy 4.1.1 contains a CSV injection vulnerability that allows attackers to inject malicious formulas into CSV reports through unfiltered server headers. Attackers can manipulate server response headers to include spreadsheet formulas that will execute when the CSV is opened in spreadsheet applications.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

Knockpy 4.1.1 contains a CSV injection vulnerability that allows attackers to inject malicious formulas into CSV reports through unfiltered server headers. Attackers can manipulate server response headers to include spreadsheet formulas that will execute when the CSV is opened in spreadsheet applications.

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

5.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/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

0.49%

38.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1236

Affected Software

Vendor	Product	Versions
Guelfoweb	Knockpy	4.1.1

References

https://github.com/guelfoweb/knockProduct
https://www.exploit-db.com/exploits/49342Exploit, Third Party Advisory
https://www.vulncheck.com/advisories/knockpy-csv-injectionThird Party Advisory
https://github.com/guelfoweb/knockProduct

Timeline

Published: Jan 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-36941?

How severe is CVE-2020-36941?

CVE-2020-36941 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36941?

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-2020-36941?

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

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Source: NVD / NIST