CVE-2020-37113

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.

CVSS v4.0

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

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

EPSS

0.78% chance of exploitation in the next 30 days, 53th percentile

Published

2026-02-03

Updated

2026-07-28

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2020-37112
• CVE-2020-37114
• CVE-2020-37111
• CVE-2020-37115
• CVE-2020-37110
• CVE-2020-37116