CVE-2020-36941 MEDIUM

CVE-2020-36941: Knockpy 4.1.1 - CSV Injection

Vendor Guelfoweb
Product knock
Weakness CWE-1236
Published January 27, 2026
Last update March 5, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 27, 2026 CVE published
March 5, 2026 Record updated