What is CVE-2022-40407?

CVE-2022-40407 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-09-29.

How severe is CVE-2022-40407?

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

Arbitrary file upload in Chamilo

CVE-2022-40407

A zip slip vulnerability in the file upload function of Chamilo v1.11 allows attackers to execute arbitrary code via a crafted Zip file.

Vulnerability class: Unrestricted File Upload

Published 2022-09-29 · 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: 0.016 (75.4th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.016 · change: +0.003

Affected products

Chamilo — versions 1.11

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/chamilo/chamilo-lms (Product)
support.chamilo.org/projects/chamilo-18/wiki/Security_issues (Exploit, Issue Tracking, Vendor Advisory)
github.com/alexmackey/security-research/blob/main/chamilo/ChamiloRceViaZipSlip… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40407?: CVE-2022-40407 is a high-severity vulnerability in Chamilo, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-09-29.
How severe is CVE-2022-40407?: High severity. CVSS v3 base score is 8.8 out of 10.