VulnerabilityModified
CVE-2021-36539
Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).
MEDIUM 6.5EPSS 0.87%
Does this matter?
Lower severity and a low EPSS score (0.87%). Track it; it rarely justifies an emergency change on its own.
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Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).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 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.87% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Affected
- instructure/canvas learning management service
- Source
- cve@mitre.org
References
- https://github.com/gaukas/instructure-canvas-file-oracleExploit, Third Party Advisory
- https://github.com/instructure/canvas-lms/issues/1905Exploit, Third Party Advisory
- https://github.com/gaukas/instructure-canvas-file-oracleExploit, Third Party Advisory
- https://github.com/instructure/canvas-lms/issues/1905Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.