What is CVE-2023-4223?

CVE-2023-4223 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-11-28.

How severe is CVE-2023-4223?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Chamilo

CVE-2023-4223

Unrestricted file upload in `/main/inc/ajax/document.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.

Vulnerability class: Unrestricted File Upload

Published 2023-11-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (78.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Chamilo — versions 0
Chamilo Lms

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

support.chamilo.org/projects/chamilo-18/wiki/security_issues (vendor-advisory, Issue Tracking, Vendor Advisory)
starlabs.sg/advisories/23/23-4223 (Exploit, Third Party Advisory, third-party-advisory)
github.com/chamilo/chamilo-lms/commit/6f32625a012d5de2dfe8edbccb4ed14a85e310d4 (Patch, patch)
github.com/chamilo/chamilo-lms/commit/3d74fb7d99bd2e287730552f7a66562417a55047 (Patch, patch)
github.com/chamilo/chamilo-lms/commit/e864127a440c2cab0eb62c113a04e2e904543a1f (Patch, patch)

Frequently asked questions

What is CVE-2023-4223?: CVE-2023-4223 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-11-28.
How severe is CVE-2023-4223?: High severity. CVSS v3 base score is 8.8 out of 10.