CVE-2023-4220

Chamilo LMS Unauthenticated Big Upload File Remote Code Execution

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Carga de archivos sin restricciones en la funcionalidad de carga de archivos grandes en `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` en Chamilo LMS en versiones <= 1.11.24 permite a atacantes no autenticados realizar ataques de Cross Site Scripting almacenados y obtener código remoto ejecución mediante la carga de web shell.

Chamilo LMS is a free software e-learning and content management system. In versions less than or equal to 1.11.24, 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 allowing for attacker controlled .php files to be uploaded to /main/inc/lib/javascript/bigupload/files/ if the /files/ directory already exists. It does not exist by default.

*Credits: Ngo Wei Lin (@Creastery) of STAR Labs SG Pte. Ltd. (@starlabs_sg)

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-08-08 CVE Reserved
2023-11-28 CVE Published
2024-07-07 First Exploit
2024-08-02 CVE Updated
2025-01-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-434: Unrestricted Upload of File with Dangerous Type

CAPEC

CAPEC-650: Upload a Web Shell to a Web Server

References (27)

URL	Tag	Source

URL	Date	SRC
https://packetstorm.news/files/id/182982	2024-12-05
https://packetstorm.news/files/id/183362	2025-01-07
https://github.com/Ziad-Sakr/Chamilo-CVE-2023-4220-Exploit	2024-07-08
https://github.com/nr4x4/CVE-2023-4220	2024-07-12
https://github.com/Al3xGD/CVE-2023-4220-Exploit	2024-07-15
https://github.com/B1TC0R3/CVE-2023-4220-PoC	2024-07-10
https://github.com/charlesgargasson/CVE-2023-4220	2024-07-11
https://github.com/insomnia-jacob/CVE-2023-4220	2024-08-07
https://github.com/VanishedPeople/CVE-2023-4220	2024-08-24
https://github.com/thefizzyfish/CVE-2023-4220	2024-08-24
https://github.com/LGenAgul/CVE-2023-4220-Proof-of-concept	2024-08-18
https://github.com/dollarboysushil/Chamilo-LMS-Unauthenticated-File-Upload-CVE-2023-4220	2024-07-07
https://github.com/qrxnz/CVE-2023-4220	2024-08-27
https://github.com/0x00-null/Chamilo-CVE-2023-4220-RCE-Exploit	2024-09-03
https://github.com/m3m0o/chamilo-lms-unauthenticated-big-upload-rce-poc	2024-10-27
https://github.com/HO4XXX/cve-2023-4220-poc	2024-07-10
https://github.com/charchit-subedi/chamilo-lms-unauthenticated-rce-poc	2024-08-02
https://github.com/bueno-armando/CVE-2023-4220-RCE	2024-10-23
https://github.com/0xDTC/Chamilo-LMS-CVE-2023-4220-Exploit	2024-10-27
https://github.com/H4cking4All/CVE-2023-4220	2024-11-02
https://github.com/oxapavan/CVE-2023-4220-HTB-PermX	2024-11-11
https://github.com/numaan911098/CVE-2023-4220	2024-11-13
https://github.com/MikeyPPPPPPPP/CVE-2023-4220	2024-12-05
https://github.com/Pr1or95/CVE-2023-4220-exploit	2024-12-05
https://starlabs.sg/advisories/23/23-4220	2024-08-02

URL	Date	SRC
https://github.com/chamilo/chamilo-lms/commit/3b487a55076fb06f96809b790a35dcdd42f8ec49	2023-12-04

URL	Date	SRC
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-130-2023-09-04-Critical-impact-High-risk-Unauthenticated-users-may-gain-XSS-and-unauthenticated-RCE-CVE-2023-4220	2023-12-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Chamilo Search vendor "Chamilo"		Chamilo Lms Search vendor "Chamilo" for product "Chamilo Lms"				<= 1.11.24 Search vendor "Chamilo" for product "Chamilo Lms" and version " <= 1.11.24"		-		Affected