CVE-2020-37113 GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass
Authenticated attackers can bypass file extension checks to upload PHP web shells, enabling remote code execution on the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-37113?
CVE-2020-37113 is a high-severity vulnerability in GUnet OpenEclass, published on 3 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-434
Which versions are affected by CVE-2020-37113?
It affects 1 product.
Products include Gunet Open Eclass Platform.
How do I fix CVE-2020-37113?
No fix has been published for CVE-2020-37113 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-37113 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37113 exists.
Other vulnerabilities in GUnet OpenEclass
- CVE-2020-37116 GUnet OpenEclass 1.7.3 E-learning platform - phpMyAdmin Remote Access
- CVE-2026-24665 Open eClass is Vulnerable to Stored Cross-Site Scripting (XSS) via Student Assignment Upload
- CVE-2026-24669 Open eClass Insecure Password Reset Token Reuse Enables Account Takeover
- CVE-2026-24773 Open eClass Unauthenticated IDOR Allows Access to Arbitrary User Files
- CVE-2020-24381 Information disclosure in n/a
Sources
Also known as GHSA-fx56-pxgc-fpm7.