CVE-2023-4220 Chamilo LMS Unauthenticated Big Upload File Remote Code Execution

What is CVE-2023-4220?

CVE-2023-4220 is a high-severity vulnerability in Chamilo Chamilo Lms, published on 28 Nov 2023.

Official description

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.

Weakness: CWE-79, CWE-434

Which versions are affected by CVE-2023-4220?

It affects 1 product.

Products include Chamilo Chamilo Lms.

How do I fix CVE-2023-4220?

No fix has been published for CVE-2023-4220 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-4220 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4220 exists.

Public exploit code: 1 Metasploit module, 1 Exploit-DB entry, 1 Nuclei template and 26 proofs of concept on GitHub.

Other vulnerabilities in Chamilo Chamilo Lms

• CVE-2025-50187 Chamilo: Evaluation of untrusted user input leads to Remote Code Execution Critical 9.8
• CVE-2023-34944 File upload in n/a Critical 9.8
• CVE-2022-27423 SQL injection in n/a Critical 9.8
• CVE-2021-35414 SQL injection in n/a Critical 9.8
• CVE-2019-13082 File upload in n/a Critical 9.8

All Chamilo Chamilo Lms vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9wc2-3gq5-2f4c.