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Vulnerability record · CVE-2021-31933 · published 30 April 2021

CVE-2021-31933: Chamilo vulnerability

Chamilo · Chamilo

A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.

7.2 CVSS 3.1 High EPSS 14% · top 3.6% CWE-706 · CWE-706
7.2CVSS 3.1 base score, v2 6.5
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.

CVSS:3.1/AV:N/AC:L/PR:H/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
http://packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
https://github.com/chamilo/chamilo-lms/commit/229302139e8d23bf6862183cf219b967f6e2fbc1 PatchThird Party Advisory
https://github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453 PatchThird Party Advisory
https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-48-2021-04-17-Critical-impact-high-risk-Remote-Code-Ex PatchVendor Advisory
http://packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
https://github.com/chamilo/chamilo-lms/commit/229302139e8d23bf6862183cf219b967f6e2fbc1 PatchThird Party Advisory
https://github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453 PatchThird Party Advisory
https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-48-2021-04-17-Critical-impact-high-risk-Remote-Code-Ex PatchVendor Advisory

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Related vulnerabilities

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

9.8CVE-2023-3533Chamilo path traversal vulnerabilityPath traversal in file upload functionality in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated attac…EPSS 3.5%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%

Source: NIST National Vulnerability Database (record CVE-2021-31933), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.