Unrestricted file upload in big file upload functionality in `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` in Chamilo LMS <= v1.11.24 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via uploading of web shell.
Published 2023-11-28 08:15:07
Updated 2023-12-04 14:53:57
View at NVD,   CVE.org
Vulnerability category: Cross site scripting (XSS)Execute code

Products affected by CVE-2023-4220

Exploit prediction scoring system (EPSS) score for CVE-2023-4220

94.50%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2023-4220

  • Chamilo v1.11.24 Unrestricted File Upload PHP Webshell
    Disclosure Date: 2023-11-28
    First seen: 2024-12-06
    exploit/linux/http/chamilo_bigupload_webshell
    Chamilo LMS is a free software e-learning and content management system. In versions prior to <= v1.11.24 a webshell can be uploaded via the bigload.php endpoint. If the GET request parameter `action` is set to `post-unsupported` file extension checks are skipped allow

CVSS scores for CVE-2023-4220

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.1
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.2
5.9
STAR Labs SG Pte. Ltd.
6.1
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.8
2.7
NIST

CWE ids for CVE-2023-4220

References for CVE-2023-4220

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