CVE-2023-3533

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
Chamilo	Chamilo	<= 1.11.20

References

https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657aPatch
https://starlabs.sg/advisories/23/23-3533/Exploit, Third Party Advisory
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-124-2023-07-13-Critical-impact-High-risk-Unauthenticated-Arbitrary-File-Write-RCE-CVE-2023-3533Issue Tracking, Patch, Vendor Advisory
https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657aPatch
https://starlabs.sg/advisories/23/23-3533/Exploit, Third Party Advisory
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-124-2023-07-13-Critical-impact-High-risk-Unauthenticated-Arbitrary-File-Write-RCE-CVE-2023-3533Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Nov 28, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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