CVE-2026-25057 | THREATINT

Description

MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, instructors are able to upload a zip file to create an assignment from an exported configuration (courses/<:course_id>/assignments/upload_config_files). The uploaded zip file entry names are used to create paths to write files to disk without checking these paths. This vulnerability is fixed in 2.9.1.

PUBLISHED Reserved 2026-01-28 | Published 2026-02-09 | Updated 2026-02-10 | Assigner GitHub_M

CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-23: Relative Path Traversal

Product status

< 2.9.1

affected

References

github.com/...Markus/security/advisories/GHSA-mccg-p332-252h

github.com/...ommit/0ca002a1f0071c7a00dbb2ed34fede57323c5dc7

github.com/MarkUsProject/Markus/releases/tag/v2.9.1

cve.org (CVE-2026-25057)

nvd.nist.gov (CVE-2026-25057)

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