CVE-2026-25057

CRITICAL

9.1

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.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published2/9/2026

Last Modified2/19/2026

Sourcenvd

Honeypot Sightings0

Affected Products

markusproject:markus

Weaknesses (CWE)

CWE-23

References

https://github.com/MarkUsProject/Markus/commit/0ca002a1f0071c7a00dbb2ed34fede57323c5dc7(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-mccg-p332-252h(security-advisories@github.com)

IOC Correlations

No correlations recorded

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