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

published 2022-09-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-43696

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits: 0; none known

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 17 mo ago (2025-05-20)

Exploit prediction

1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

support.chamilo.org https://support.chamilo.org/projects/chamilo-18/wiki/Security_issues#Issue-94-2022-09-06-High-impact-Moderate-risk-Authenticated-RCE-via-zipslip-attack-in-file-upload referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/alexmackey/security-research/blob/main/chamilo/ChamiloRceViaZipSlip.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

support.chamilo.org /projects/chamilo-18/wiki/Security_issues#Issue-94-2022-09-06-High-impact-Moderate-risk-Authenticated-RCE-via-
exploit, issue-tracking, vendor-advisory
github.com /alexmackey/security-research/blob/main/chamilo/ChamiloRceViaZipSlip.md
exploit, third-party-advisory
github.com /chamilo/chamilo-lms
product

Sources

CVE List CVE-2022-40407
NVD CVE-2022-40407

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary