CVE-2026-28405

HIGH

8.0

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.

CVE Details

CVSS v3.1 Score8.0

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published3/5/2026

Last Modified3/10/2026

Sourcenvd

Honeypot Sightings0

Affected Products

markusproject:markus

Weaknesses (CWE)

CWE-79

References

https://github.com/MarkUsProject/Markus/commit/55d74f2ddb72d2ec2f29aa2b4cb6b2da10755036(security-advisories@github.com)

https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1(security-advisories@github.com)

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-p5pc-pxrj-3893(security-advisories@github.com)

IOC Correlations

No correlations recorded

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