CVE-2026-39422

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This allows an attacker to execute arbitrary JavaScript in the victim's browser context. This issue has been fixed in version 2.8.0."}, {"lang": "es", "value": "MaxKB es un asistente de IA de c\u00f3digo abierto para empresas. Las versiones 2.7.1 e inferiores contienen una vulnerabilidad de cross-site scripting almacenado (XSS) a trav\u00e9s de los campos de nombre o icono de la aplicaci\u00f3n al crear una aplicaci\u00f3n. Cuando una v\u00edctima visita la interfaz de chat p\u00fablica (/ui/chat/{access_token}), el ChatHeadersMiddleware recupera los datos de la aplicaci\u00f3n e inserta directamente el nombre y el icono de la aplicaci\u00f3n sin escapar en la respuesta HTML mediante reemplazo de cadena. Esto permite a un atacante ejecutar JavaScript arbitrario en el contexto del navegador de la v\u00edctima. Este problema ha sido solucionado en la versi\u00f3n 2.8.0."}], "id": "CVE-2026-39422", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "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": 6.9, "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": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/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": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39422", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-14T13:32:38.264425Z", "version": "2.0.3"}}]}, "published": "2026-04-14T01:16:04.850", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/1Panel-dev/MaxKB/commit/026a2d623e2aa5efa67c4834651e79d5d7cab1da"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-wf7p-3jq5-q52w"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-wf7p-3jq5-q52w"}], "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": "[0,2.8.0)"}}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "MaxKB", "source": "cna", "vendor": "1Panel-dev"}, "product": "maxkb", "vendor": "1panel"}], "analysis": {"en": {"generated_at": "2026-04-14T02:21:14.498312+00:00", "value": {"mitigation_remediation": ["Upgrade MaxKB to version 2.8.0 or later.", "Remove or sanitize existing application entries that contain malicious name or icon fields.", "Ensure future deployments validate and escape user input for application metadata."], "summary": {"action": "Immediate Patch", "impact": "Stored Cross\u2011Site Scripting enabling arbitrary JavaScript execution in users' browsers."}, "threat_synthesis": {"affected_systems": "The issue affects the 1Panel\u2011dev MaxKB platform, specifically all releases version 2.7.1 and earlier. Version 2.8.0 releases the fix that properly escapes these fields.", "description_and_impact": "A stored cross\u2011site scripting vulnerability allows an attacker to embed malicious JavaScript into the application name or icon fields when creating an application. The ChatHeadersMiddleware then retrieves this data and inserts it unescaped into the public chat page, causing the script to run in any visitor\u2019s browser. The weakness is classified as CWE\u201179 and can lead to session hijacking, data theft, and defacement of the web interface.", "risk_and_exploitability": "The CVSS score of 6.9 indicates moderate severity. Exploitation requires the attacker to create or modify an application with malicious fields, and relies on a victim visiting the public chat URL with an access token. Because the vulnerability is stored and can be reused, any user who accesses the chat interface is at risk. No EPSS data is available, and the vulnerability is not listed in the CISA KEV catalog, indicating no widespread exploitation yet."}}}}, "created": "2026-04-14T16:16:15.095817+00:00", "updated": "2026-04-14T16:31:11.503372+00:00", "vendors": ["1panel", "1panel$PRODUCT$maxkb"]}