CVE-2021-36539
6.5 · MEDIUMOverview
CVE-2021-36539 is a medium-severity vulnerability affecting instructure canvas_learning_management_service. It was published on January 26, 2023 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).
Remediation
Check the references section for vendor advisories and patches from instructure. Update canvas_learning_management_service to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| instructure | canvas_learning_management_service | >= 0, < 2022-10-15 | Affected |
Frequently Asked Questions
What is CVE-2021-36539?
CVE-2021-36539 is a medium-severity vulnerability affecting instructure canvas_learning_management_service. It was published on January 26, 2023 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-36539?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-36539?
Check the references section for vendor advisories and patches from instructure. Update canvas_learning_management_service to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-36539?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-36539 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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