# CVE-2023-4220

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.

- Page: https://www.vulneraibility.com/cve/CVE-2023-4220
- CVSS: 8.1
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 76.08% (percentile 99.5)
- Public exploit code: 1 on Exploit-DB · 1 Metasploit module · 26 GitHub proofs of concept · 1 Nuclei template (first 2024-07-07)
- Weakness: CWE-434
- Published: 2023-11-28

## Affected versions

- Chamilo: affected <= 1.11.24

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-130-2023-09-04-Critical-impact-High-risk-Unauthenticated-users-may-gain-XSS-and-unauthenticated-RCE-CVE-2023-4220
- [advisory] https://starlabs.sg/advisories/23/23-4220
- [patch] https://github.com/chamilo/chamilo-lms/commit/3b487a55076fb06f96809b790a35dcdd42f8ec49

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.