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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.

PUBLISHED Reserved 2026-02-03 | Published 2026-02-03 | Updated 2026-02-06 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Neutralization of Special Elements in a File Name or Extension (File Upload)

Product status

1.7.3 (2007)
affected

Credits

emaragkos finder

References

www.exploit-db.com/exploits/48163 (ExploitDB-48163) exploit

www.openeclass.org/ (Official Vendor Homepage) product

download.openeclass.org/files/docs/1.7/CHANGES.txt (Changelog) patch

www.vulncheck.com/...g-platform-file-upload-extension-bypass (VulnCheck Advisory: GUnet OpenEclass 1.7.3 E-learning platform - File Upload Extension Bypass) third-party-advisory

cve.org (CVE-2020-37113)

nvd.nist.gov (CVE-2020-37113)

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