CVE-2024-51743
HIGHDescription
MarkUs is a web application for the submission and grading of student assignments. In versions prior to 2.4.8, an arbitrary file write vulnerability in the update/upload/create file methods in Controllers allows authenticated instructors to write arbitrary files to any location on the web server MarkUs is running on (depending on the permissions of the underlying filesystem). e.g. This can lead to a delayed remote code execution in case an attacker is able to write a Ruby file into the config/initializers/ subfolder of the Ruby on Rails application. MarkUs v2.4.8 has addressed this issue. No known workarounds are available at the application level aside from upgrading.
How to fix
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 50% of all known CVEs.
References
Related Vulnerabilities
Other CWE-434 (Unrestricted File Upload) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2017-12617 | High | 8.1 | 100% | KEV | Fix |
| CVE-2018-15961 | Critical | 9.8 | 100% | KEV | - |
| CVE-2021-31207 | Medium | 6.6 | 100% | KEV + Ransom | Fix |
| CVE-2017-12615 | High | 8.1 | 100% | KEV + Ransom | - |
| CVE-2025-31324 | Critical | 10.0 | 99% | KEV + Ransom | - |
| CVE-2024-50623 | Critical | 9.8 | 99% | KEV + Ransom | Fix |
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-09-04.