Vulnerability-Lookup

GHSA-X2H4-97PF-V2RR

Vulnerability from github – Published: 2026-01-27 18:32 – Updated: 2026-01-27 18:32

Details

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.

Severity ?

9.8 (Critical)


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

5.3 (Medium)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2020-36941"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1236"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-27T16:16:11Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-x2h4-97pf-v2rr",
  "modified": "2026-01-27T18:32:13Z",
  "published": "2026-01-27T18:32:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36941"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guelfoweb/knock"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49342"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/knockpy-csv-injection"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2020-36941 (GCVE-0-2020-36941)

Vulnerability from cvelistv5 – Published: 2026-01-27 15:23 – Updated: 2026-01-27 21:37

Title

Knockpy 4.1.1 - CSV Injection

Summary

Severity ?

5.3 (Medium)


                        
                          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

9.8 (Critical)


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

CWE

CWE-1236 - Improper Neutralization of Formula Elements in a CSV File

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/49342	exploit
	https://github.com/guelfoweb/knock	product
	https://www.vulncheck.com/advisories/knockpy-csv-…	third-party-advisory

Impacted products

	Vendor	Product	Version
	guelfoweb	knock	Affected: 4.1.1

Credits

Dolev Farhi

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2020-36941",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-27T21:08:49.664460Z",
                "version": "2.0.3"
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      "descriptions": [
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        }
      ],
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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-X2H4-97PF-V2RR

CVE-2020-36941 (GCVE-0-2020-36941)

Tags

Sightings

Nomenclature