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TI-2020-19076 Aliases CVE-2020-36941GHSA-x2h4-97pf-v2rr

Knockpy 4.1.1 - CSV Injection

Priority MEDIUM 63CWE-1236Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00587 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
guelfowebknock4.1.1—No fix listedCNA
  • knock Vendorguelfoweb Affected 4.1.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:guelfoweb:knockpy:4.1.1:*:*:*:*:*:*:*4.1.1Vulnerableguelfoweb
  • cpe:2.3:a:guelfoweb:knockpy:4.1.1:*:*:*:*:*:*:* Versions 4.1.1 Vulnerable ·guelfoweb

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-36941
  2. 2026-10-03 Alias added: GHSA-x2h4-97pf-v2rr

References

Exploit 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences