Vulnerability Description
MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content route reads the contents of a student-submitted file and renders them without sanitization. This issue has been patched in version 2.9.1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Markusproject | Markus | < 2.9.1 |
Related Weaknesses (CWE)
References
- https://github.com/MarkUsProject/Markus/commit/55d74f2ddb72d2ec2f29aa2b4cb6b2da1Patch
- https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1Release Notes
- https://github.com/MarkUsProject/Markus/security/advisories/GHSA-p5pc-pxrj-3893Vendor Advisory
FAQ
What is CVE-2026-28405?
CVE-2026-28405 is a vulnerability with a CVSS score of 8.0 (HIGH). MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content route reads th...
How severe is CVE-2026-28405?
CVE-2026-28405 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28405?
Check the references section above for vendor advisories and patch information. Affected products include: Markusproject Markus.