CVE-2026-22241
Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)
- Published
- Jan 8, 2026
- Updated
- Jan 23, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Apr 29, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLow · next 30 days
- Percentile
- 88.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, an arbitrary file upload vulnerability in the theme import functionality enables an attacker with administrative privileges to upload arbitrary files on the server's file system. The main cause of the issue is that no validation or sanitization of the file's present inside the zip archive. This leads to remote code execution on the web server. Version 4.2 patches the issue.
Sources
5- CVE-2026-22241Research
CVE-2026-22241
- CVE-2026-22241Exploit
Automated exploit for CVE-2026-22241, an unrestricted file upload vulnerability in Open eClass, enabling remote code execution via a webshell with automatic cleanup.
Lab Environment for CVE-2026-22241
Responsible use
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