VULNERABILITY INTELLIGENCE

CVE-2021-36539

CVSS score6.5 MEDIUM
EPSS probability0.87%
CISA KEVNot currently listed
Published2023-01-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).

Weakness classification

  • CWE-639: Authorization Bypass Through User-Controlled Key

Primary references