CVE-2026-50539

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50539", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-04T20:37:18.653Z", "datePublished": "2026-10-28T15:31:12.074Z", "dateUpdated": "2026-10-28T16:06:48.627Z"}, "containers": {"cna": {"title": "Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6"}, {"name": "https://github.com/xibosignage/xibo-cms/pull/3487", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/pull/3487"}, {"name": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74"}, {"name": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3"}, {"name": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3"}, {"name": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta"}], "affected": [{"vendor": "xibosignage", "product": "xibo-cms", "versions": [{"version": "< 4.4.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T15:31:12.074Z"}, "descriptions": [{"lang": "en", "value": "Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.3, missing object-level authorization on `/notification/export/{id}` allows an authenticated user to download attachments from any notification, including notifications created by administrators, by iterating over `sequential notification IDs`. Exploitation requires access to the `Notification Centre` to view past notifications, a privilege granted to non-administrators as standard. This issue is fixed in version 4.4.3."}], "source": {"advisory": "GHSA-p4pg-v57g-7jf6", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-28T16:01:06.316667Z", "id": "CVE-2026-50539", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-28T16:06:48.627Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50539", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-04T20:37:18.653Z", "datePublished": "2026-10-28T15:31:12.074Z", "dateUpdated": "2026-10-28T16:06:48.627Z"}, "containers": {"cna": {"title": "Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated Users to Download Arbitrary Attachments", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6"}, {"name": "https://github.com/xibosignage/xibo-cms/pull/3487", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/pull/3487"}, {"name": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74"}, {"name": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3"}, {"name": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3"}, {"name": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta", "tags": ["x_refsource_MISC"], "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta"}], "affected": [{"vendor": "xibosignage", "product": "xibo-cms", "versions": [{"version": "< 4.4.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T15:31:12.074Z"}, "descriptions": [{"lang": "en", "value": "Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.3, missing object-level authorization on `/notification/export/{id}` allows an authenticated user to download attachments from any notification, including notifications created by administrators, by iterating over `sequential notification IDs`. Exploitation requires access to the `Notification Centre` to view past notifications, a privilege granted to non-administrators as standard. This issue is fixed in version 4.4.3."}], "source": {"advisory": "GHSA-p4pg-v57g-7jf6", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-50539", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-28T16:01:06.316667Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-28T16:01:14.976Z"}}]}}

{"affected": [{"affectedData": [{"product": "xibo-cms", "vendor": "xibosignage", "versions": [{"status": "affected", "version": "< 4.4.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.3, missing object-level authorization on `/notification/export/{id}` allows an authenticated user to download attachments from any notification, including notifications created by administrators, by iterating over `sequential notification IDs`. Exploitation requires access to the `Notification Centre` to view past notifications, a privilege granted to non-administrators as standard. This issue is fixed in version 4.4.3."}, {"lang": "es", "value": "Xibo es una plataforma de se\u00f1alizaci\u00f3n digital de c\u00f3digo abierto con un sistema de gesti\u00f3n de contenido web y software de reproductor de pantalla para Windows. Versiones anteriores a la 4.4.3, la falta de autorizaci\u00f3n a nivel de objeto en \u201c/notification/export/{id}\u201d permite a un usuario autenticado descargar archivos adjuntos de cualquier notificaci\u00f3n, incluidas las creadas por administradores, al iterar sobre los \u2019ID de notificaci\u00f3n secuenciales\u2019. La explotaci\u00f3n requiere acceso al \u2019Centro de Notificaciones\u2019 para ver notificaciones anteriores, un privilegio concedido a los usuarios no administradores de forma est\u00e1ndar. Este problema se solucion\u00f3 en la versi\u00f3n 4.4.3."}], "id": "CVE-2026-50539", "lastModified": "2026-11-04T23:10:00.223", "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": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50539", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-28T16:01:06.316667Z", "version": "2.0.3"}}]}, "published": "2026-10-28T16:17:07.733", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/commit/13ed6e6bf3c15a93089b4fd2148379888ee82d74"}, {"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/commit/1dcc3f2de6dc7861e7dbb5148e94f14ebb1513b3"}, {"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/pull/3487"}, {"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta"}, {"source": "security-advisories@github.com", "url": "https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-p4pg-v57g-7jf6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.4.3)"}}], "enrichment": {"confidence": 89.0, "confidence_source": "matching", "scores": [{"score": 89.0, "source": "matching"}]}, "original": {"product": "xibo-cms", "source": "cna", "vendor": "xibosignage"}, "product": "xibo", "vendor": "xibosignage"}], "created": "2026-10-28T16:30:15.961687+00:00", "updated": "2026-10-28T22:00:16.643881+00:00", "vendors": ["xibosignage", "xibosignage$PRODUCT$xibo"]}