CVE-2026-33323

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Prior to versions 8.6.51 and 9.6.0-alpha.40, the Pages route and legacy PublicAPI route for resending email verification links return distinguishable responses depending on whether the provided username exists and has an unverified email. This allows an unauthenticated attacker to enumerate valid usernames by observing different redirect targets. The existing emailVerifySuccessOnInvalidEmail configuration option, which is enabled by default and protects the API route against this, did not apply to these routes. This issue has been patched in versions 8.6.51 and 9.6.0-alpha.40."}, {"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 8.6.51 y 9.6.0-alpha.40, la ruta Pages y la ruta PublicAPI heredada para reenviar enlaces de verificaci\u00f3n de correo electr\u00f3nico devuelven respuestas distinguibles dependiendo de si el nombre de usuario proporcionado existe y tiene un correo electr\u00f3nico sin verificar. Esto permite a un atacante no autenticado enumerar nombres de usuario v\u00e1lidos observando diferentes objetivos de redirecci\u00f3n. La opci\u00f3n de configuraci\u00f3n existente emailVerifySuccessOnInvalidEmail, que est\u00e1 habilitada por defecto y protege la ruta API contra esto, no se aplicaba a estas rutas. Este problema ha sido parcheado en las versiones 8.6.51 y 9.6.0-alpha.40."}], "id": "CVE-2026-33323", "lastModified": "2026-06-17T10:37:19.460", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "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": 6.3, "baseSeverity": "MEDIUM", "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:L/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": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33323", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T13:56:28.643271Z", "version": "2.0.3"}}]}, "published": "2026-03-24T19:16:52.890", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/967aa57732202009b2389ce9ecb3130d53d657e5"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/fbda4cb0c5cbc8fad08a216823b6b64d4ae289c3"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10238"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10243"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-h29g-q5c2-9h4f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-204"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.51)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.40)"}}], "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": "2026-03-25T23:48:38.077241+00:00", "value": {"mitigation_remediation": ["Upgrade Parse Server to at least version 8.6.51 for the stable 8.x line or to 9.6.0\u2011alpha.40 for the 9.x alpha line, and verify that the deployment is running a patched release before re\u2011enabling the email\u2011verification\u2011resend functionality.", "If an upgrade cannot be performed immediately, apply rate limiting or blocking to the Pages and legacy PublicAPI resend routes to reduce enumeration opportunities."], "summary": {"action": "Patch", "impact": "User Enumeration"}, "threat_synthesis": {"affected_systems": "All releases of Parse Server before 8.6.51 and before 9.6.0\u2011alpha.40 are affected, including every 9.6.x alpha up to alpha.39 and earlier stable releases. The vulnerability impacts the Pages route and the legacy PublicAPI route that handle email\u2011verification\u2011resend requests, regardless of deployment environment.", "description_and_impact": "Parse Server\u2019s email\u2011verification\u2011resend pages return different responses based on whether the provided username exists and has an unverified email. A valid username causes a redirect to a success page, while an invalid or already verified account triggers a different redirect. This discrepancy allows an unauthenticated attacker to determine if a user account exists, exposing sensitive information. The weakness is classified as CWE\u2011204, information exposure through identifier leakage.", "risk_and_exploitability": "The CVSS score of 6.3 indicates moderate severity, and the EPSS figure of less than 1\u202f% suggests low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog. Attack is unauthenticated; an adversary simply submits a username to the resend endpoint and observes the redirect target to enumerate valid accounts."}}}}, "created": "2026-03-25T11:46:48.594028+00:00", "updated": "2026-03-26T12:19:40.862851+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}