Vulnerability 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Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).
CVSS Score
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Instructure | Canvas Learning Management Service | < 2022-10-15 |
Related Weaknesses (CWE)
References
- https://github.com/gaukas/instructure-canvas-file-oracleExploitThird Party Advisory
- https://github.com/instructure/canvas-lms/issues/1905ExploitThird Party Advisory
- https://github.com/gaukas/instructure-canvas-file-oracleExploitThird Party Advisory
- https://github.com/instructure/canvas-lms/issues/1905ExploitThird Party Advisory
FAQ
What is CVE-2021-36539?
CVE-2021-36539 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).
How severe is CVE-2021-36539?
CVE-2021-36539 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-36539?
Check the references section above for vendor advisories and patch information. Affected products include: Instructure Canvas Learning Management Service.