CVE-2026-33163

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Prior to 9.6.0-alpha.35 and 8.6.50, when a `Parse.Cloud.afterLiveQueryEvent` trigger is registered for a class, the LiveQuery server leaks protected fields and `authData` to all subscribers of that class. Fields configured as protected via Class-Level Permissions (`protectedFields`) are included in LiveQuery event payloads for all event types (create, update, delete, enter, leave). Any user with sufficient CLP permissions to subscribe to the affected class can receive protected field data of other users, including sensitive personal information and OAuth tokens from third-party authentication providers. The vulnerability was caused by a reference detachment bug. When an `afterEvent` trigger is registered, the LiveQuery server converts the event object to a `Parse.Object` for the trigger, then creates a new JSON copy via `toJSONwithObjects()`. The sensitive data filter was applied to the `Parse.Object` reference, but the unfiltered JSON copy was sent to clients. The fix in versions 9.6.0-alpha.35 and 8.6.50 ensures that the JSON copy is assigned back to the response object before filtering, so the filter operates on the actual data sent to clients. As a workaround, remove all `Parse.Cloud.afterLiveQueryEvent` trigger registrations. Without an `afterEvent` trigger, the reference detachment does not occur and protected fields are correctly filtered."}, {"lang": "es", "value": "Parse Server es un backend de c\u00f3digo abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de las versiones 9.6.0-alpha.35 y 8.6.50, cuando un disparador 'Parse.Cloud.afterLiveQueryEvent' se registra para una clase, el servidor LiveQuery filtra campos protegidos y 'authData' a todos los suscriptores de esa clase. Los campos configurados como protegidos a trav\u00e9s de Permisos a Nivel de Clase ('protectedFields') se incluyen en las cargas \u00fatiles de eventos de LiveQuery para todos los tipos de eventos (crear, actualizar, eliminar, entrar, salir). Cualquier usuario con permisos CLP suficientes para suscribirse a la clase afectada puede recibir datos de campos protegidos de otros usuarios, incluyendo informaci\u00f3n personal sensible y tokens OAuth de proveedores de autenticaci\u00f3n de terceros. La vulnerabilidad fue causada por un error de desvinculaci\u00f3n de referencia. Cuando un disparador 'afterEvent' se registra, el servidor LiveQuery convierte el objeto de evento en un 'Parse.Object' para el disparador, luego crea una nueva copia JSON a trav\u00e9s de 'toJSONwithObjects()'. El filtro de datos sensibles se aplic\u00f3 a la referencia de 'Parse.Object', pero la copia JSON sin filtrar fue enviada a los clientes. La correcci\u00f3n en las versiones 9.6.0-alpha.35 y 8.6.50 asegura que la copia JSON se reasigne al objeto de respuesta antes de filtrar, de modo que el filtro opera sobre los datos reales enviados a los clientes. Como soluci\u00f3n alternativa, elimine todos los registros de disparadores 'Parse.Cloud.afterLiveQueryEvent'. Sin un disparador 'afterEvent', la desvinculaci\u00f3n de referencia no ocurre y los campos protegidos se filtran correctamente."}], "id": "CVE-2026-33163", "lastModified": "2026-06-17T10:37:03.473", "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": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33163", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-19T14:00:23.867731Z", "version": "2.0.3"}}]}, "published": "2026-03-18T22:16:26.270", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10232"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10233"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-5hmj-jcgp-6hff"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.50)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "parse-server", "source": "cna", "vendor": "parse-community"}, "product": "parse_server", "vendor": "parse_community"}], "analysis": {"en": {"generated_at": "2026-03-19T17:22:40.433678+00:00", "value": {"mitigation_remediation": ["Upgrade Parse Server to version 9.6.0\u2011alpha.35 or 8.6.50 or later, which removes the reference detachment bug", "As a temporary workaround, remove all Parse.Cloud.afterLiveQueryEvent trigger registrations from your application to prevent the unfiltered JSON copy from being sent to clients", "Verify the removal by checking LiveQuery event payloads or monitoring your logs for the presence of protected field data", "Apply additional controls such as adjusting Class\u2011Level Permissions to restrict CLP subscriptions to trusted users"], "summary": {"action": "Immediate Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "Affecting parse-community:parse-server versions prior to 9.6.0\u2011alpha.35 and 8.6.50. All alpha releases from 9.6.0\u2011alpha.1 through 9.6.0\u2011alpha.34 are impacted, as indicated by the CPE entries. Environments running these versions and executing a `Parse.Cloud.afterLiveQueryEvent` trigger for any class exposed to LiveQuery subscriptions are at risk.", "description_and_impact": "The vulnerability in Parse Server allows an attacker to receive protected fields and authData for any user who has permission to subscribe to a class that has a `Parse.Cloud.afterLiveQueryEvent` trigger registered. Because the LiveQuery server creates an unfiltered JSON copy of the event object before applying the protected\u2011fields filter, payloads sent to subscribers contain sensitive personal information and OAuth tokens. This results in a confidentiality breach consistent with CWE\u2011200, where protected data is unintentionally disclosed to unauthorized parties.", "risk_and_exploitability": "The CVSS score of 8.2 classifies this as a high\u2011severity vulnerability. EPSS is reported as less than 1\u202f%, suggesting a low likelihood of exploitation, and it is not listed in the CISA KEV catalog. Exploitation requires that an attacker can subscribe to the affected class and that a live\u2011query after\u2011event trigger is registered; no other special prerequisites are specified. The vulnerability exploits a reference detachment bug that leads to data leakage via the unfiltered JSON copy returned to clients."}}}}, "created": "2026-03-19T08:55:15.044759+00:00", "updated": "2026-03-25T11:51:58.036639+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}