# CVE-2026-25057

## Summary

- **CVE ID:** CVE-2026-25057
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-23
- **Published:** Feb 9, 2026
- **Last Modified:** Mar 12, 2026

## 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.

## Affected Products

- MarkUsProject — Markus (< 2.9.1)

## References

- [CNA](https://github.com/MarkUsProject/Markus/security/advisories/GHSA-mccg-p332-252h)
- [CNA](https://github.com/MarkUsProject/Markus/commit/0ca002a1f0071c7a00dbb2ed34fede57323c5dc7)
- [CNA](https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 39.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._