CVE-2026-27177

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When an administrator views the property editor in the admin panel, the stored values are rendered without escaping in both a paragraph tag (SOURCE field) and a textarea element (VALUE field). The XSS fires on page load without requiring any click from the admin. Additionally, the session cookie lacks the HttpOnly flag, enabling session hijack via document.cookie exfiltration. An attacker can enumerate properties via the unauthenticated /api.php/data/ endpoint and poison any property with malicious JavaScript."}, {"lang": "es", "value": "MajorDoMo (tambi\u00e9n conocido como Major Domestic Module) contiene una vulnerabilidad de cross-site scripting (XSS) almacenado a trav\u00e9s del endpoint /objects/?op=set, que est\u00e1 intencionalmente sin autenticar para la integraci\u00f3n de dispositivos IoT. Los valores de propiedad proporcionados por el usuario se almacenan sin procesar en la base de datos sin saneamiento. Cuando un administrador ve el editor de propiedades en el panel de administraci\u00f3n, los valores almacenados se renderizan sin escape tanto en una etiqueta de p\u00e1rrafo (campo SOURCE) como en un elemento de \u00e1rea de texto (campo VALUE). El XSS se activa al cargar la p\u00e1gina sin requerir ning\u00fan clic del administrador. Adem\u00e1s, la cookie de sesi\u00f3n carece de la bandera HttpOnly, lo que permite el secuestro de sesi\u00f3n a trav\u00e9s de la exfiltraci\u00f3n de document.cookie. Un atacante puede enumerar propiedades a trav\u00e9s del endpoint /api.php/data/ sin autenticar y envenenar cualquier propiedad con JavaScript malicioso."}], "id": "CVE-2026-27177", "lastModified": "2026-06-17T10:26:48.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "disclosure@vulncheck.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "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": 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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27177", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-20T19:27:30.071976Z", "version": "2.0.3"}}]}, "published": "2026-02-18T22:16:25.610", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://chocapikk.com/posts/2026/majordomo-revisited/"}, {"source": "disclosure@vulncheck.com", "tags": ["Exploit", "Issue Tracking"], "url": "https://github.com/sergejey/majordomo/pull/1177"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/majordomo-stored-cross-site-scripting-via-property-set-endpoint"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "MajorDoMo", "source": "cna", "vendor": "sergejey"}, "product": "majordomo", "vendor": "sergejey"}], "analysis": {"en": {"generated_at": "2026-04-16T17:05:38.415435+00:00", "value": {"mitigation_remediation": ["Upgrade MajorDoMo to the latest release that sanitizes property inputs or patches the /objects/?op=set endpoint", "Configure the web server to set the HttpOnly flag on the session cookie to prevent client\u2011side script access", "Restrict or remove unauthenticated access to the /objects/?op=set and /api.php/data/ endpoints, either by enabling authentication or by limiting the IP addresses that can reach them"], "summary": {"action": "Apply Patch", "impact": "Stored XSS with potential session hijack"}, "threat_synthesis": {"affected_systems": "MajorDoMo (Major Domestic Module) provided by sergejey. No specific product version numbers are listed in the CNA data; therefore any deployment where the /objects/?op=set endpoint is exposed as documented is vulnerable.", "description_and_impact": "A stored cross\u2011site scripting flaw exists on the MajorDoMo /objects/?op=set endpoint, which accepts property values without sanitization and stores them directly in the database. When an administrator opens the property editor, the unsanitized data is rendered inside a paragraph tag and a textarea on page load, automatically executing any embedded script. The vulnerability also allows an attacker, via the unauthenticated /api.php/data/ endpoint, to enumerate properties and inject malicious JSON to poison them. In addition, session cookies are transmitted without the HttpOnly flag, permitting session hijack through document.cookie exfiltration. The exposed defect therefore lets a remote unauthenticated user permanently compromise the administrator interface, potentially gaining full control over the device and its network traffic.", "risk_and_exploitability": "The vulnerability scores a CVSS of 5.3, indicating moderate severity, with an EPSS score stored in the (0%,1%) interval and absence from the CISA KEV catalog. Attackers do not require credentials; the unauthenticated property endpoint is the primary attack vector. Exploitation involves submitting a crafted property value containing JavaScript, causing arbitrary script execution when an admin loads the property editor. Given the lack of authentication and the impairing session cookie flag, the risk is significant for environments where the device is accessed remotely or managed by administrators with elevated privileges."}}}}, "created": "2026-02-19T10:11:02.899045+00:00", "updated": "2026-04-16T17:15:17.979370+00:00", "vendors": ["sergejey", "sergejey$PRODUCT$majordomo"]}