CVE-2021-36539

medium

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Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).

References

https://github.com/instructure/canvas-lms/issues/1905

https://github.com/gaukas/instructure-canvas-file-oracle

Details

Source: Mitre, NVD

Published: 2023-01-26

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

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