CVE-2023-3545

Public Exploit
Chamilo LMS Htaccess File Upload Security Bypass

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 2.99% Top 15%
Vendor Advisory chamilo.org
Affected: Chamilo Chamilo
Published at:
Updated at:

References

Link Tags
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 vendor advisory issue tracking
https://starlabs.sg/advisories/23/23-3545/ third party advisory exploit
https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549 patch

Frequently Asked Questions

What is the severity of CVE-2023-3545?
CVE-2023-3545 has been scored as a critical severity vulnerability.
How to fix CVE-2023-3545?
To fix CVE-2023-3545, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-3545 being actively exploited in the wild?
It is possible that CVE-2023-3545 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-3545?
CVE-2023-3545 affects Chamilo Chamilo.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.