Improper Access Control in Instructure Canvas LMS Allows Unprivileged Users to Access Locked/Unpublished Files

CVE-2021-36539 · MEDIUM Severity

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).

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