Vulnerability in Guelfoweb Knock
CVE-2020-36941
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 th…
EPSS: 0.005 (38.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Guelfoweb Knock — versions 4.1.1
- Guelfoweb Knockpy — versions 4.1.1
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2020-36941?
- CVE-2020-36941 is a critical-severity vulnerability in Guelfoweb Knock, classified under Improper Neutralization of Formula Elements in a CSV File. CVSS score: 9.8/10. Published 2026-01-27.
- How severe is CVE-2020-36941?
- Critical severity. CVSS v3 base score is 9.8 out of 10.