TI-2024-34420 Aliases CVE-2024-51499

MarkUs Arbitrary File Write leading up to remote code execution (student accounts)

LOW 32CWE-434Published 2024-11-18 · Updated 2024-11-18

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

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 accessible via the update_files method of the SubmissionsController allows authenticated users (e.g. students) 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00716 54th percentileScored 2026-11-07

Fix Fixed Markus (MarkUsProject): 2.4.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MarkUsProject	Markus	before 2.4.8	2.4.8	Patch available	CNA

Markus VendorMarkUsProject Affected before 2.4.8 Fixed in 2.4.8 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:markusproject:markus::::::::	before 2.4.8	Vulnerable	MarkUsProject

cpe:2.3:a:markusproject:markus:*:*:*:*:*:*:*:* Versions before 2.4.8 Vulnerable ·MarkUsProject

Remediation

Fix · CNA Markus (MarkUsProject) Fixed in 2.4.8

Timeline

2026-10-02 Threatist record created from CVE-2024-51499

References

Patch 1

https://github.com/MarkUsProject/Markus/pull/7026

Advisory 1

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-j95p-7936-f75w

TI-2026-20241 Zip Slip in MarkUs config upload allowing RCE CVSS 3.1CRITICAL 9.1
TI-2026-22679 MarkUs: Stored XSS in Submission HTML Preview Enables Instructor-Context Actions CVSS 3.1HIGH 8.0
TI-2024-34648 Arbitrary File Write leading up to remote code execution (instructor accounts) CVSS 4.0HIGH 7.1
TI-2026-20987 MarkUs: Zip bomb in config upload enables DoS CVSS 3.1MEDIUM 6.5
TI-2026-20085 MarkUs has a submission-view IDOR exposes all student submissions CVSS 3.1MEDIUM 6.5
TI-2024-32087 MarkUs vulnerable to Path Traversal CVSS 3.1MEDIUM 5.7

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences