CVE-2020-37113

moderate-risk
Published 2026-02-03

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.

Do I need to act?

-
0.25% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Gunet

References (4)

Release Notes https://download.openeclass.org/files/docs/1.7/CHANGES.txt
Exploit https://www.exploit-db.com/exploits/48163
Product https://www.openeclass.org/
Third Party Advisory https://www.vulncheck.com/advisories/gunet-openeclass-e-learning-platform-file-u...
36
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal