VulnerabilityAnalyzed

CVE-2026-24900

This parameter was not correctly scoped to the requesting user, allowing users access arbitrary submission file contents by id.

MEDIUM 6.5EPSS 0.26%

Does this matter?

Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.26% probability · 18th percentile
CISA KEV: Not listed
Weakness: CWE-639
Affected: markusproject/markus
Source: security-advisories@github.com

References

https://github.com/MarkUsProject/Markus/commit/7daed9fd2d44932223798d997b55094a3bff104bPatch
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1Product, Release Notes
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-56gh-8hmq-7q88Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.