CVE-2020-37113

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

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

Openeclass · GUnet OpenEclass

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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:X

CVSS v3.1 VULNCHECK

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.91% chance of exploitation in the next 30 days, 59th percentile

Published

2026-02-03

Updated

2026-07-28

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/48163

Security advisories

• https://www.vulncheck.com/advisories/gunet-openeclass-e-learning-platform-file-upload-ext…
• https://download.openeclass.org/files/docs/1.7/CHANGES.txt
• https://www.openeclass.org

References

• CVE Record
• NVD entry