FKIE_CVE-2026-28803

Vulnerability from fkie_nvd - Published: 2026-03-11 16:16 - Updated: 2026-03-17 19:19
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
Open Forms allows users create and publish smart forms. Prior to 3.3.13 and 3.4.5, to be able to cosign, the cosigner receives an e-mail with instructions or a deep-link to start the cosign flow. The submission reference is communicated so that the user can retrieve the submission to be cosigned. Attackers can guess a code or modify the received code to look up arbitrary submissions, after logging in (with DigiD/eHerkenning/... depending on form configuration). This vulnerability is fixed in 3.3.13 and 3.4.5.
References
security-advisories@github.comhttps://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
maykinmedia open_forms *
maykinmedia open_forms *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "19C86DE6-DC79-4B71-89AD-3A43741BE51D",
              "versionEndExcluding": "3.3.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DFE1882C-1659-4E5A-B21A-D08B09DA32B8",
              "versionEndExcluding": "3.4.5",
              "versionStartIncluding": "3.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open Forms allows users create and publish smart forms. Prior to 3.3.13 and 3.4.5, to be able to cosign, the cosigner receives an e-mail with instructions or a deep-link to start the cosign flow. The submission reference is communicated so that the user can retrieve the submission to be cosigned. Attackers can guess a code or modify the received code to look up arbitrary submissions, after logging in (with DigiD/eHerkenning/... depending on form configuration). This vulnerability is fixed in 3.3.13 and 3.4.5."
    },
    {
      "lang": "es",
      "value": "Open Forms permite a los usuarios crear y publicar formularios inteligentes. Antes de 3.3.13 y 3.4.5, para poder cosignar, el cosignatario recibe un correo electr\u00f3nico con instrucciones o un enlace profundo para iniciar el flujo de cosignatura. La referencia de la presentaci\u00f3n se comunica para que el usuario pueda recuperar la presentaci\u00f3n a ser cosignada. Los atacantes pueden adivinar un c\u00f3digo o modificar el c\u00f3digo recibido para buscar presentaciones arbitrarias, despu\u00e9s de iniciar sesi\u00f3n (con DigiD/eHerkenning/... dependiendo de la configuraci\u00f3n del formulario). Esta vulnerabilidad est\u00e1 corregida en 3.3.13 y 3.4.5."
    }
  ],
  "id": "CVE-2026-28803",
  "lastModified": "2026-03-17T19:19:19.560",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-11T16:16:40.630",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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