CVE-2026-84423 (GCVE-0-2026-84423)

Vulnerability from cvelistv5 – Published: 2026-09-01 22:45 – Updated: 2026-09-01 22:45
VLAI
Title
Casdoor upload-resource API resource.go missing authentication
Summary
A vulnerability has been found in Casdoor up to 4.0.0. This affects an unknown function of the file controllers/resource.go of the component upload-resource API. Such manipulation leads to missing authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor deleted the GitHub issue for this vulnerability without any explanation. Afterwards the vendor was contacted early about this disclosure via email but did not respond in any way.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a Casdoor Affected: 4.0
    cpe:2.3:a:casdoor:casdoor:*:*:*:*:*:*:*:*
Credits
geochen (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
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      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:casdoor:casdoor:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "upload-resource API"
          ],
          "product": "Casdoor",
          "vendor": "n/a",
          "versions": [
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              "version": "4.0"
            }
          ]
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      ],
      "credits": [
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          "type": "reporter",
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        },
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        }
      ],
      "metrics": [
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              "description": "Improper Authentication",
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      "providerMetadata": {
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        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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        },
        {
          "name": "VDB-397791 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
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          "url": "https://vuldb.com/vuln/397791/cti"
        },
        {
          "name": "CVE-2026-84423 | CVE Analysis and Report",
          "tags": [
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          ],
          "url": "https://vuldb.com/cve/CVE-2026-84423"
        },
        {
          "name": "Submit #883037 | casdoor commit 0585ecf Missing Authorization",
          "tags": [
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          "url": "https://vuldb.com/submit/883037"
        },
        {
          "tags": [
            "issue-tracking"
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          "url": "https://github.com/casdoor/casdoor/issues/5617"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource"
        },
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          "time": "2026-09-01T02:00:00.000Z",
          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2026-09-01T20:00:19.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Casdoor upload-resource API resource.go missing authentication",
      "x_generator": [
        "VulDB PVTS v202609"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-84423",
    "datePublished": "2026-09-01T22:45:22.377Z",
    "dateReserved": "2026-09-01T17:55:13.244Z",
    "dateUpdated": "2026-09-01T22:45:22.377Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.