CVE-2023-3545

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.

• CWE-178
• CWE-178

• https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549Patch
• https://starlabs.sg/advisories/23/23-3545/Exploit, Third Party 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-2023-3545Issue Tracking, Vendor Advisory
• https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549Patch
• https://starlabs.sg/advisories/23/23-3545/Exploit, Third Party 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-2023-3545Issue Tracking, Vendor Advisory

Published

Nov 28, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-35394Azure HDInsight Jupyter Notebook Spoofing Vulnerability4.6
• CVE-2023-3540A vulnerability, which was classified as problematic, was fo…6.1
• CVE-2023-3541A vulnerability has been found in ThinuTech ThinuCMS 1.5 and…6.1
• CVE-2023-3542A vulnerability was found in ThinuTech ThinuCMS 1.5 and clas…6.1
• CVE-2023-3543A vulnerability was found in GZ Scripts Availability Booking…6.1
• CVE-2023-3544A vulnerability was found in GZ Scripts Time Slot Booking Ca…6.1
• CVE-2023-3547The All in One B2B for WooCommerce WordPress plugin through …8.8
• CVE-2023-3548An unauthorized user could gain account access to IQ Wifi 6 …9.8
• CVE-2023-3549Rejected reason: This CVE ID has been rejected or withdrawn …
• CVE-2023-3550Mediawiki v1.40.0 does not validate namespaces used in XML f…7.3
• CVE-2023-3551 Code Injection in GitHub repository nilsteampassnet/teampas…7.2
• CVE-2023-3552Improper Encoding or Escaping of Output in GitHub repository…5.4