CVE-2023-3545

CRITICAL

Chamilo < 1.11.20 - Unauthenticated Remote Code Execution via .htaccess File Upload

Title source: llm

Description

Improper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS <= v1.11.20 on Windows and Apache installations allows unauthenticated attackers to bypass file upload security protections and obtain remote code execution via uploading of `.htaccess` file. This vulnerability may be exploited by privileged attackers or chained with unauthenticated arbitrary file write vulnerabilities, such as CVE-2023-3533, to achieve remote code execution.

References (3)

Core 3

Core References

Issue Tracking, Vendor Advisory vendor-advisory

https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-125-2023-07-13-Critical-impact-Moderate-risk-Htaccess-File-Upload-Security-Bypass-on-Windows-CVE-2023-3545

Exploit, Third Party Advisory third-party-advisory

https://starlabs.sg/advisories/23/23-3545/

Patch patch

https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549

View Patch ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0196

EPSS Percentile 77.7%

Attack Vector NETWORK

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

Details

CWE

CWE-178

Status published

Products (1)

chamilo/chamilo < 1.11.20

Published Nov 28, 2023

Tracked Since Feb 18, 2026