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CVE-2026-25057

Markusproject Markus path traversal

9.1 CRITICALEPSS 0.53%
  1. Published9 Feb 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Markusproject Markus< 2.9.1

Remediation

Fixed in
Markusproject Markus≥ 2.9.1

References

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Frequently asked

Is CVE-2026-25057 being actively exploited?

CVE-2026-25057 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.53%.

How severe is CVE-2026-25057?

CVE-2026-25057 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2026-25057?

Affected products include Markusproject Markus.

How do I fix CVE-2026-25057?

Upgrade affected software to a fixed version, for example Markusproject Markus 2.9.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25057 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.