Vulnerability · Published Feb 3, 2026 · Assigned by VulnCheck
CVE-2020-37113GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass
High 8.8
In plain English
A high-severity unrestricted file upload in GUnet OpenEclass from Openeclass. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 39.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Openeclass | GUnet OpenEclass | 1.7.3 (2007) |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-48163 exploit
- Official Vendor Homepage product
- Changelog patch
- VulnCheck Advisory: GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass third-party-advisory