Vulnerability-Lookup

GHSA-JFGG-FV6Q-274F

Vulnerability from github – Published: 2026-01-31 00:30 – Updated: 2026-01-31 00:30

Details

Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.

Severity

8.8 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2020-37023"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-30T23:16:06Z",
    "severity": "HIGH"
  },
  "details": "Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.",
  "id": "GHSA-jfgg-fv6q-274f",
  "modified": "2026-01-31T00:30:28Z",
  "published": "2026-01-31T00:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-37023"
    },
    {
      "type": "WEB",
      "url": "https://github.com/V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/48706"
    },
    {
      "type": "WEB",
      "url": "https://www.softaculous.com/apps/cms/Koken"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/koken-cms-arbitrary-file-upload"
    },
    {
      "type": "WEB",
      "url": "http://koken.me"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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-2020-37023 (GCVE-0-2020-37023)

Vulnerability from cvelistv5 – Published: 2026-01-30 22:07 – Updated: 2026-02-03 20:35

Title

Koken CMS 0.22.24 - Arbitrary File Upload

Summary

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


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

CWE

CWE-434 - Unrestricted Upload of File with Dangerous Type

Assigner

VulnCheck

References

5 references

URL	Tags
https://www.exploit-db.com/exploits/48706	exploit
http://koken.me/	product
https://www.softaculous.com/apps/cms/Koken	product
https://github.com/V1n1v131r4/Bypass-File-Upload-…	technical-descriptionexploit
https://www.vulncheck.com/advisories/koken-cms-ar…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Koken	Koken CMS	Affected: 0.22.24

Date Public

2020-07-15 00:00

Credits

v1n1v131r4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2020-37023",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-03T20:35:36.172554Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-03T20:35:43.390Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Koken CMS",
          "vendor": "Koken",
          "versions": [
            {
              "status": "affected",
              "version": "0.22.24"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "v1n1v131r4"
        }
      ],
      "datePublic": "2020-07-15T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-434",
              "description": "Unrestricted Upload of File with Dangerous Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-30T22:07:08.591Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "ExploitDB-48706",
          "tags": [
            "exploit"
          ],
          "url": "https://www.exploit-db.com/exploits/48706"
        },
        {
          "name": "Koken CMS Official Homepage",
          "tags": [
            "product"
          ],
          "url": "http://koken.me/"
        },
        {
          "name": "Softaculous Koken CMS Software Page",
          "tags": [
            "product"
          ],
          "url": "https://www.softaculous.com/apps/cms/Koken"
        },
        {
          "name": "Researcher PoC",
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://github.com/V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md"
        },
        {
          "name": "VulnCheck Advisory: Koken CMS 0.22.24 - Arbitrary File Upload",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/koken-cms-arbitrary-file-upload"
        }
      ],
      "title": "Koken CMS 0.22.24 - Arbitrary File Upload",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2020-37023",
    "datePublished": "2026-01-30T22:07:08.591Z",
    "dateReserved": "2026-01-28T18:18:30.522Z",
    "dateUpdated": "2026-02-03T20:35:43.390Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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-JFGG-FV6Q-274F

CVE-2020-37023 (GCVE-0-2020-37023)

Tags

Sightings

Nomenclature