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Vulnerability record · CVE-2023-3533 · published 28 November 2023

CVE-2023-3533: Chamilo path traversal vulnerability

Chamilo · Chamilo

Path traversal in file upload functionality in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via arbitrary file write.

9.8 CVSS 3.1 Critical EPSS 3.5% · top 11.3% CWE-22 · Path traversal
9.8CVSS 3.1 base score
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Path traversal in file upload functionality in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via arbitrary file write.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657a Patch
https://starlabs.sg/advisories/23/23-3533/ ExploitThird Party Advisory
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-124-2023-07-13-Critical-impact-High-risk-Unau Issue TrackingPatchVendor Advisory
https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657a Patch
https://starlabs.sg/advisories/23/23-3533/ ExploitThird Party Advisory
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-124-2023-07-13-Critical-impact-High-risk-Unau Issue TrackingPatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-3545Chamilo vulnerabilityImproper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS <= v1.11.20 on Windows and Apache installations allows unauthenticated atta…EPSS 2.4%9.8CVE-2023-3368Chamilo LMS unauthenticated command injection in additional_webservices.phpChamilo LMS through v1.11.20 fails to neutralise special characters in /main/webservices/additional_webservices.php, allowing OS command injection. T…EPSS 70%analysed9.8CVE-2023-34960Chamilo wsConvertPpt SOAP command injectionChamilo versions 1.11.* up to 1.11.18 contain a command injection flaw in the wsConvertPpt component. A crafted PowerPoint name sent through a SOAP A…EPSS 99%analysed9.8CVE-2021-34187Chamilo sql injection vulnerabilitymain/inc/ajax/model.ajax.php in Chamilo through 1.11.14 allows SQL Injection via the searchField, filters, or filters2 parameter.EPSS 16%8.8CVE-2022-42029Chamilo unrestricted file upload vulnerabilityChamilo 1.11.16 is affected by an authenticated local file inclusion vulnerability which allows authenticated users with access to 'big file uploads'…EPSS 0.76%8.8CVE-2022-40407Chamilo unrestricted file upload vulnerabilityA zip slip vulnerability in the file upload function of Chamilo v1.11 allows attackers to execute arbitrary code via a crafted Zip file.EPSS 1.6%8.8CVE-2021-40662Chamilo cross-site request forgery vulnerabilityA Cross-Site Request Forgery (CSRF) in Chamilo LMS 1.11.14 allows attackers to execute arbitrary commands on victim hosts via user interaction with a…EPSS 1.1%7.2CVE-2021-31933Chamilo vulnerabilityA remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and …EPSS 14%

Source: NIST National Vulnerability Database (record CVE-2023-3533), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.