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En las versiones de Craft desde la 4.0.0-RC1 hasta antes de la 4.17.0-beta.1 y la 5.9.0-beta.1, existe una vulnerabilidad de escalada de privilegios en la API GraphQL de Craft CMS que permite a un usuario autenticado con acceso de escritura a un volumen de activos escalar sus privilegios y modificar/transferir activos pertenecientes a cualquier otro volumen, incluidos vol\u00famenes restringidos o privados a los que no deber\u00edan tener acceso. La mutaci\u00f3n GraphQL saveAsset valida la autorizaci\u00f3n contra el volumen resuelto por el esquema, pero recupera el activo objetivo por ID sin verificar que el activo pertenezca al volumen autorizado. Esto permite la modificaci\u00f3n y transferencia no autorizada de activos entre vol\u00famenes. 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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.0.0-RC1,5.8.22)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0-RC1,4.17.0-beta.1)"}}], "product": "craftcms", "vendor": "craftcms"}], "analysis": {"en": {"generated_at": "2026-04-18T18:13:21.723258+00:00", "value": {"mitigation_remediation": ["Upgrade Craft CMS to version 4.17.0\u2011beta.1 or any newer release, or to 5.9.0\u2011beta.1 or newer, which contain the fix for the GraphQL mutation authorization flaw.", "If an upgrade cannot be performed immediately, remove write permissions from asset volumes containing sensitive or private assets so that no user can exploit the flaw across volumes.", "Disable the GraphQL API for non\u2011administrative users or restrict GraphQL usage to a subset of trusted roles until the vulnerability is patched."], "summary": {"action": "Apply Patch", "impact": "Privilege Escalation"}, "threat_synthesis": {"affected_systems": "Craft CMS versions from 4.0.0\u2011RC1 up to, but not including, 4.17.0\u2011beta.1 and from 5.0.0 up to, but not including, 5.9.0\u2011beta.1 are affected. All 4.x and 5.x major releases that include the GraphQL API and asset volume handling fall into this range.", "description_and_impact": "Craft CMS includes a GraphQL API mutation that lets an authenticated user with write permission to an asset volume modify or transfer assets that belong to other volumes, including those that are restricted or private. The mutation verifies authorization against the source volume but does not check that the target asset actually resides in the authorized volume, creating a privilege\u2011escalation flaw.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 8.6 (high) and an EPSS score of less than 1%. It is not listed in the CISA KEV catalog. Exploitation requires a valid authenticated account with write access to at least one asset volume; the attacker then sends GraphQL mutations targeting asset IDs in other volumes, bypassing the missing authorization check and enabling unauthorized asset modification or transfer."}}}}, "created": "2026-02-10T15:37:27.480605+00:00", "updated": "2026-04-18T18:15:06.620697+00:00", "vendors": ["craftcms", "craftcms$PRODUCT$craftcms"]}