CVE-2023-4220

HighPublished

Chamilo LMS Unauthenticated Big Upload File Remote Code Execution

Published: Nov 28, 2023
Updated: Aug 2, 2024
Assigning CNA: STAR_Labs
Evidence observed: Mar 18, 2025

Primary CVSS

8.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

76.1%

High · next 30 days

Percentile: 99.5%
Model date: Oct 19, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Unrestricted file upload in big file upload functionality in `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` in Chamilo LMS <= v1.11.24 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via uploading of web shell.

Sources

Repository evidence: Files: 2 · Repositories: 2

1 Module1 Template

Chamilo v1.11.24 Unrestricted File Upload PHP WebshellModule
modules/exploits/linux/http/chamilo_bigupload_webshell.rb
Metasploit Framework modules
ExploitEvidence observed: Sep 26, 2026Revision: 1e321cedaf4cRelated tool
Declared conditions
- platform: PHP($.exploit_linux/http/chamilo_bigupload_webshell.platform)
- verification: check_declared($.exploit_linux/http/chamilo_bigupload_webshell.check)
Chamilo LMS <= 1.11.24 - Remote Code ExecutionTemplate
http/cves/2023/CVE-2023-4220.yaml
Nuclei Templates
DetectionEvidence observed: Sep 26, 2026Revision: 008731b339bdRelated tool
Declared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)

Responsible use

Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.