CVE-2026-33067

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{"affected": [{"affectedData": [{"product": "siyuan", "vendor": "siyuan-note", "versions": [{"status": "affected", "version": "< 3.6.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*", "matchCriteriaId": "E1AA6470-222A-4841-A487-DF65F9859780", "versionEndExcluding": "3.6.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim's operating system \u2014 with zero user interaction beyond opening the marketplace tab. This issue has been fixed in version 3.6.1."}, {"lang": "es", "value": "SiYuan es un sistema de gesti\u00f3n de conocimiento personal. Las versiones 3.6.0 e inferiores renderizan los campos de metadatos del paquete (displayName, description) utilizando literales de plantilla sin escape HTML. Un autor de paquete malicioso puede inyectar HTML/JavaScript arbitrario en estos campos, lo que se ejecuta autom\u00e1ticamente cuando cualquier usuario navega por la p\u00e1gina de Bazaar. Debido a que la configuraci\u00f3n de Electron de SiYuan habilita nodeIntegration: true con contextIsolation: false, este XSS escala directamente a la ejecuci\u00f3n remota de c\u00f3digo completa en el sistema operativo de la v\u00edctima \u2014 con cero interacci\u00f3n del usuario m\u00e1s all\u00e1 de abrir la pesta\u00f1a del marketplace. Este problema ha sido solucionado en la versi\u00f3n 3.6.1."}], "id": "CVE-2026-33067", "lastModified": "2026-06-17T10:36:53.690", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "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": 5.3, "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/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": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33067", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-20T16:07:37.828477Z", "version": "2.0.3"}}]}, "published": "2026-03-20T09:16:14.863", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvpm-v6q4-m2pf"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvpm-v6q4-m2pf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.6.1)"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 84.0, "source": "matching"}]}, "original": {"product": "siyuan", "source": "cna", "vendor": "siyuan-note"}, "product": "siyuan", "vendor": "siyuan"}], "analysis": {"en": {"generated_at": "2026-03-23T16:52:59.059536+00:00", "value": {"mitigation_remediation": ["Upgrade SiYuan to version 3.6.1 or later, which sanitizes Bazai package metadata fields."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is SiYuan, the personal knowledge\u2011management system from the vendor siyuan-note. Versions 3.6.0 and all prior releases are vulnerable; the issue was resolved in version 3.6.1, which sanitizes package metadata before rendering.", "description_and_impact": "SiYuan\u2019s Bazaar package metadata appears in the application without HTML escaping. A malicious author can insert arbitrary HTML or JavaScript into the display name or description fields, which is rendered when any user visits the Bazaar page. Because the Electron configuration enables node integration and disables context isolation, the injected script runs with full Node.js privileges. This elevates the ordinary client\u2011side XSS to a full remote code execution that operates on the victim\u2019s operating system without any further user interaction beyond opening the marketplace tab.", "risk_and_exploitability": "The base CVSS score of 5.3 and an EPSS less than 1% indicate a moderate severity with a currently low exploitation probability. The vulnerability is not listed in the CISA KEV catalog, and no widespread active exploitation has been reported. An attacker would need to host or persuade a victim to install a malicious Bazaar package, but once the package is viewed the attacker can execute arbitrary system commands, representing a significant threat to any device running the affected SiYuan installation."}}}}, "created": "2026-03-20T10:36:39.109507+00:00", "updated": "2026-03-25T14:29:54.537907+00:00", "vendors": ["siyuan", "siyuan$PRODUCT$siyuan"]}