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Fencer Vulns
high 7.2

CVE-2026-22241 json

Open eClass has Unrestricted File Upload that Leads to Remote Code Execution (RCE)

published 2026-01-08 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-1672

cvss
7.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • gunet open_eclass_platform 4.2
  • openeclass openeclass 4.2

Timeline

  1. Published
  2. First public exploit (EDB-52519)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
10 mo ago

Exploit prediction

3.26% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52519 GUnet OpenEclass E-learning platform < 4.2 - Remote Code Execution (RCE) webapps, 2026-04-29
  • github.com https://github.com/gunet/openeclass/security/advisories/GHSA-rf6j-xgqp-wjxg referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/gunet/openeclass/security/advisories/GHSA-gq72-7mwg-424r referenced PoC, tagged "exploit" by a source, unverified
  • twelvesec.com https://twelvesec.com/2026/01/16/rce-via-arbitrary-file-upload-at-open-eclass/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 7.3 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
CNA 4.0 7.3 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:X/V:X/RE:X/U:X
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • gunet openeclass

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.