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CVE-2026-28405

MarkUs: Stored XSS in Submission HTML Preview Enables Instructor-Context Actions PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
MarkUsProject / Markusaffected < 2.9.1

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.