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TI-2021-14790 Aliases CVE-2021-36539GHSA-pw89-gxgv-mjvm

Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the…

Priority LOW 31CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-639.

Summary

Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).

Why it matters now

EPSS 0.00904 60th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:instructure:canvas_learning_management_service:*:*:*:*:*:*:*:*before 2022-10-15VulnerableInstructure
  • cpe:2.3:a:instructure:canvas_learning_management_service:*:*:*:*:*:*:*:* Versions before 2022-10-15 Vulnerable ·Instructure

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-36539
  2. 2026-10-03 Alias added: GHSA-pw89-gxgv-mjvm

References

Exploit 2

  • TI-2020-04703 Server-side request forgery in Instructure Canvas Learning Management System CVSS 3.1MEDIUM 5.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences