Vulnerabilities CVE-2020-37113

CVE-2020-37113

High

Open

TLP:CLEAR

GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass

NVD CVE.org

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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.

Details

CVSS Score: 8.7
EPSS Score ⓘ: 0.78%

52.7th percentile
CVSS Vector: 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
Confidence: 90%
Published: Feb 3, 2026
Last Modified: Jul 28, 2026

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