CVE-2020-36941

Knockpy 4.1.1 - CSV Injection

CVSS 5.3 MEDIUMEPSS 0.5%CWE-1236

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

guelfoweb · knock

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References

https://github.com/guelfoweb/knock https://www.exploit-db.com/exploits/49342 https://www.vulncheck.com/advisories/knockpy-csv-injection