What’s Vulnerable › Vulnerabilities

CVE-2026-22241: Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-08 · updated 2026-06-17
• Weakness: CWE-434

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.

Affected products

• Openeclass: before 4.1 — fixed in 4.1

How to fix

Upgrade to a fixed version: Openeclass 4.1. Check the vendor advisory for mitigations.

References

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

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