CVE-2026-28405: fallo de gravedad alta en MarkUsProject Markus
MarkUs: Stored XSS in Submission HTML Preview Enables Instructor-Context Actions
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8epss 0.3%
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:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Productos afectados
MarkUsProject · MarkusCVEs relacionadas — MarkUsProject Markus
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-47820MEDIUMMarkUs vulnerable to Path TraversalEPSS 0.7%CVE-2024-51743HIGHArbitrary File Write leading up to remote code execution (instructor accounts)EPSS 0.7%CVE-2024-51499HIGHMarkUs Arbitrary File Write leading up to remote code execution (student accounts)EPSS 0.7%CVE-2026-25057CRITICALZip Slip in MarkUs config upload allowing RCEEPSS 0.5%CVE-2026-27807MEDIUMMarkUs: YAML alias (‘billion laughs’) DoS in config uploadEPSS 0.3%CVE-2026-24900MEDIUMMarkUs has a submission-view IDOR exposes all student submissionsEPSS 0.3%