CVE-2020-36941 | THREATINT

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.

PUBLISHED Reserved 2026-01-25 | Published 2026-01-27 | Updated 2026-01-27 | Assigner VulnCheck

MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Neutralization of Formula Elements in a CSV File

Product status

4.1.1

affected

Credits

Dolev Farhi finder

References

github.com/guelfoweb/knock exploit

www.exploit-db.com/exploits/49342 (ExploitDB-49342) exploit

github.com/guelfoweb/knock (Knockpy GitHub Repository) product

www.vulncheck.com/advisories/knockpy-csv-injection (VulnCheck Advisory: Knockpy 4.1.1 - CSV Injection) third-party-advisory

cve.org (CVE-2020-36941)

nvd.nist.gov (CVE-2020-36941)

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