CVE-2021-36539

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-36539", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-04T00:54:51.500Z", "dateReserved": "2021-07-12T00:00:00.000Z", "datePublished": "2023-01-26T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-01-31T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url)."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/instructure/canvas-lms/issues/1905"}, {"url": "https://github.com/gaukas/instructure-canvas-file-oracle"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:54:51.500Z"}, "title": "CVE Program Container", "references": [{"url": "https://github.com/instructure/canvas-lms/issues/1905", "tags": ["x_transferred"]}, {"url": "https://github.com/gaukas/instructure-canvas-file-oracle", "tags": ["x_transferred"]}]}]}}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:instructure:canvas_learning_management_service:*:*:*:*:*:*:*:*", "matchCriteriaId": "64B90B12-957C-4A19-BFFA-DC8983B4AA2D", "versionEndExcluding": "2022-10-15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url)."}, {"lang": "es", "value": "Instructure Canvas LMS no deneg\u00f3 correctamente el acceso a archivos bloqueados/no publicados cuando el usuario sin privilegios accedi\u00f3 a la URL de vista previa del archivo basada en DocViewer (canvadoc_session_url)."}], "id": "CVE-2021-36539", "lastModified": "2026-06-17T03:58:54.473", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-01-26T21:15:23.730", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/gaukas/instructure-canvas-file-oracle"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/instructure/canvas-lms/issues/1905"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/gaukas/instructure-canvas-file-oracle"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/instructure/canvas-lms/issues/1905"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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