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Vulnerability record · CVE-2026-22241 · published 8 January 2026

CVE-2026-22241: Openeclass unrestricted file upload vulnerability

Openeclass · Openeclass

The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, an arbitrary file upload vulnerability in the theme import functionality enables an attacker with administrative privileges to upload arbitrary files on the server's file system. The main cause of the issue is that no validation or sanitization of the file's present inside the zip archive. This leads to remote code execution on the web server. Version 4.2 patches the issue.

7.3 CVSS 4.0 High EPSS 3.3% · top 11.9% CWE-434 · Unrestricted file upload
7.3CVSS 4.0 base score
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 5 tagged exploit
17 Jun 2026Last modified by NVD

Description

The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, an arbitrary file upload vulnerability in the theme import functionality enables an attacker with administrative privileges to upload arbitrary files on the server's file system. The main cause of the issue is that no validation or sanitization of the file's present inside the zip archive. This leads to remote code execution on the web server. Version 4.2 patches the issue.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/gunet/openeclass/commit/3f9d267b79812a4dd708bb1302339e6a5abe67d9 Patch
https://github.com/gunet/openeclass/security/advisories/GHSA-gq72-7mwg-424r ExploitThird Party Advisory
https://github.com/gunet/openeclass/security/advisories/GHSA-rf6j-xgqp-wjxg ExploitThird Party Advisory
https://github.com/gunet/openeclass/security/advisories/GHSA-gq72-7mwg-424r ExploitThird Party Advisory
https://twelvesec.com/2026/01/16/rce-via-arbitrary-file-upload-at-open-eclass/ ExploitThird Party Advisory
https://github.com/gunet/openeclass/security/advisories/GHSA-rf6j-xgqp-wjxg ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-22241), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.