CVE-2020-37113
GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass
- State
- Published
- Severity
- 8.7 High
- Published
- Feb 3, 2026
- Updated
- Jul 28, 2026
- Reserved
- Feb 3, 2026
Description
GUnet OpenEclass 1.7.3 allows authenticated users to bypass file extension restrictions when uploading files. By renaming a PHP file to .php3 or .PhP, an attacker can upload a web shell and execute arbitrary code on the server. This vulnerability enables remote code execution by bypassing the intended file type checks in the exercise submission feature.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-434 Improper Neutralization of Special Elements in a File Name or Extension (File Upload)
Affected Products
| Product | Versions |
|---|---|
GUnet OpenEclassOpeneclass |
|
References
- ExploitDB-48163exploit
- Official Vendor Homepageproduct
- Changelogpatch
- VulnCheck Advisory: GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypassthird-party-advisory
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