CVE-2026-28803

{"id": "CVE-2026-28803", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2026-03-11T16:16:40.630", "references": [{"url": "https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5", "tags": ["Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-284"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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."}], "lastModified": "2026-03-17T19:19:19.560", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "19C86DE6-DC79-4B71-89AD-3A43741BE51D", "versionEndExcluding": "3.3.13"}, {"criteria": "cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DFE1882C-1659-4E5A-B21A-D08B09DA32B8", "versionEndExcluding": "3.4.5", "versionStartIncluding": "3.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}