CVE-2026-24900 — MEDIUM (6.5)

Vulnerability Description

MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content accepted a select_file_id parameter to serve SubmissionFile objects containing a record of files submitted by students. This parameter was not correctly scoped to the requesting user, allowing users access arbitrary submission file contents by id. This vulnerability is fixed in 2.9.1.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Markusproject	Markus	< 2.9.1

Related Weaknesses (CWE)

CWE-639

References

https://github.com/MarkUsProject/Markus/commit/7daed9fd2d44932223798d997b55094a3Patch
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1ProductRelease Notes
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-56gh-8hmq-7q88Vendor Advisory

FAQ

What is CVE-2026-24900?

CVE-2026-24900 is a vulnerability with a CVSS score of 6.5 (MEDIUM). MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content accepted a select_file...

How severe is CVE-2026-24900?

CVE-2026-24900 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-24900?

Check the references section above for vendor advisories and patch information. Affected products include: Markusproject Markus.