CVE-2026-33421

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Prior to versions 8.6.53 and 9.6.0-alpha.42, Parse Server's LiveQuery WebSocket interface does not enforce Class-Level Permission (CLP) pointer permissions (readUserFields and pointerFields). Any authenticated user can subscribe to LiveQuery events and receive real-time updates for all objects in classes protected by pointer permissions, regardless of whether the pointer fields on those objects point to the subscribing user. This bypasses the intended read access control, allowing unauthorized access to potentially sensitive data that is correctly restricted via the REST API. This issue has been patched in versions 8.6.53 and 9.6.0-alpha.42."}, {"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 8.6.53 y 9.6.0-alpha.42, la interfaz LiveQuery WebSocket de Parse Server no aplica los permisos de puntero de Permiso a Nivel de Clase (CLP) (readUserFields y pointerFields). Cualquier usuario autenticado puede suscribirse a eventos LiveQuery y recibir actualizaciones en tiempo real para todos los objetos en clases protegidas por permisos de puntero, independientemente de si los campos de puntero en esos objetos apuntan al usuario suscriptor. Esto elude el control de acceso de lectura previsto, permitiendo el acceso no autorizado a datos potencialmente sensibles que est\u00e1n correctamente restringidos a trav\u00e9s de la API REST. Este problema ha sido parcheado en las versiones 8.6.53 y 9.6.0-alpha.42."}], "id": "CVE-2026-33421", "lastModified": "2026-06-17T10:37:28.143", "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": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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-2026-33421", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-24T20:18:10.579714Z", "version": "2.0.3"}}]}, "published": "2026-03-24T19:16:53.713", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/6c3317aca6eb618ac48f999021ae3ef7766ad1ea"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/976dad109f3fe3fbd0a3a35ef62e7a5d35eb0bee"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10250"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10252"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-fph2-r4qg-9576"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.53)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.42)"}}], "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": "2026-03-25T22:52:10.483444+00:00", "value": {"mitigation_remediation": ["Upgrade Parse Server to version 8.6.53 or newer, or 9.6.0\u2011alpha.42 or newer.", "If an upgrade is not currently possible, consider disabling LiveQuery or restricting WebSocket access to only trusted users.", "Continuously monitor the Parse Server community releases and security advisories for additional patches or mitigations."], "summary": {"action": "Apply Patch", "impact": "Unauthorized Data Exposure via Bypassed Access Controls"}, "threat_synthesis": {"affected_systems": "The issue affects the open\u2011source Parse Server (parse-community:parse\u2011server) running on Node.js. All released versions prior to 8.6.53 and 9.6.0\u2011alpha.42 are vulnerable, including the numerous alpha releases enumerated in the CPE list.", "description_and_impact": "The vulnerability lies in Parse Server\u2019s LiveQuery WebSocket interface, which, before versions 8.6.53 and 9.6.0-alpha.42, fails to enforce Class-Level Permission (CLP) pointer permissions such as readUserFields and pointerFields. As a result, any authenticated user can subscribe to LiveQuery events and receive real\u2010time updates for all objects in classes that normally protect pointer fields. This bypass directly violates the intended read access control and allows an attacker to view sensitive data that would otherwise be hidden by the REST API.", "risk_and_exploitability": "The CVSS score of 7.1 indicates a moderate to high level of severity. The EPSS score of less than 1\u202f% suggests that exploitation is unlikely in the near term, and the vulnerability is not listed in the CISA KEV catalog. Exploitation would most likely occur through an authenticated WebSocket connection to the LiveQuery endpoint, enabling an attacker to subscribe to updates and capture data that should be inaccessible."}}}}, "created": "2026-03-25T11:46:45.910479+00:00", "updated": "2026-03-26T12:19:01.461289+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}