What is CVE-2023-4220?

CVE-2023-4220 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2023-11-28.

How severe is CVE-2023-4220?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2023-4220 known to be exploited?

45 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Chamilo

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 remot…

Vulnerability class: Unrestricted File Upload

EPSS: 0.925 (99.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Chamilo — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

support.chamilo.org/projects/chamilo-18/wiki/security_issues (vendor-advisory)
starlabs.sg/advisories/23/23-4220 (third-party-advisory)
github.com/chamilo/chamilo-lms/commit/3b487a55076fb06f96809b790a35dcdd42f8ec49 (patch)

Frequently asked questions

What is CVE-2023-4220?: CVE-2023-4220 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2023-11-28.
How severe is CVE-2023-4220?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2023-4220 known to be exploited?: 45 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.