CVE-2026-28405

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 v3 8.0 HIGH

8.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/MarkUsProject/Markus/commit/55d74f2ddb72d2ec2f29aa2b4cb6b2da10755036	Patch
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1	Release Notes
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-p5pc-pxrj-3893	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:markusproject:markus:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-05 21:16

Updated : 2026-03-10 19:53

NVD link : CVE-2026-28405

Mitre link : CVE-2026-28405

CVE.ORG link : CVE-2026-28405

JSON object : View

Products Affected

markusproject

markus

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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