CVE-2026-28781

{"id": "CVE-2026-28781", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-28781", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-04T17:36:36.759532Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "craftcms", "product": "cms", "versions": [{"status": "affected", "version": ">= 5.0.0-RC1, < 5.9.0-beta.1"}, {"status": "affected", "version": ">= 4.0.0-RC1, < 4.17.0-beta.1"}]}]}], "published": "2026-03-04T17:16:21.370", "references": [{"url": "https://github.com/craftcms/cms/commit/830b403870cd784b47ae42a3f5a16e7ac2d7f5a8", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/craftcms/cms/commit/c6dcbdffaf6ab3ffe77d317336684d83699f4542", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/craftcms/cms/security/advisories/GHSA-2xfc-g69j-x2mp", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-915"}]}], "descriptions": [{"lang": "en", "value": "Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with \"Create Entries\" permission can inject the authorIds[] (or authorId) parameter into the POST request, which the backend processes without verifying if the current user is authorized to assign authorship to others. Normally, this field is not present in the request for users without the necessary permissions. By manually adding this parameter, an attacker can attribute the new entry to any user, including Admins. This effectively \"spoofs\" the authorship. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1."}, {"lang": "es", "value": "Craft es un sistema de gesti\u00f3n de contenido (CMS). Antes de 4.17.0-beta.1 y 5.9.0-beta.1, el proceso de creaci\u00f3n de entradas permite la Asignaci\u00f3n Masiva del atributo authorId. Un usuario con permiso para 'Crear Entradas' puede inyectar el par\u00e1metro authorIds[] (o authorId) en la solicitud POST, que el backend procesa sin verificar si el usuario actual est\u00e1 autorizado para asignar la autor\u00eda a otros. Normalmente, este campo no est\u00e1 presente en la solicitud para usuarios sin los permisos necesarios. Al a\u00f1adir manualmente este par\u00e1metro, un atacante puede atribuir la nueva entrada a cualquier usuario, incluidos los administradores. Esto efectivamente 'suplanta' la autor\u00eda. Esta vulnerabilidad est\u00e1 corregida en 4.17.0-beta.1 y 5.9.0-beta.1."}], "lastModified": "2026-06-17T10:29:01.963", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FD3AD543-D77F-4B2E-AF8D-1C7C724BD26D", "versionEndExcluding": "4.17.0", "versionStartExcluding": "4.0.0"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "81B9164E-4845-4D81-A841-378CE4E32485", "versionEndExcluding": "5.9.0", "versionStartExcluding": "5.0.0"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "610F6DE9-720F-45B3-81D5-18E7F6B090FD"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CC2F40FC-7C27-456A-B16D-679410D1D5CF"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FBAA8227-04F8-404C-907B-B0162B325F5A"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "21B28E2C-327A-4CE6-ACAD-97E459712A55"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C7461CF-35AB-48E1-88B6-956DAE1D2AB4"}, {"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8D8E02D1-601A-4E2B-B619-4775BFDB72D0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}