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MEDIUM

CVE-2023-4220

CVSS v3

6.1

MEDIUM

EPSS Score

76.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2023-4220 yet.

Full record on NVD

Description

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.

Technical details

Published
2023-11-28
Exploit-DB
EDB-52083

Frequently asked questions

What is CVE-2023-4220?

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.

Is CVE-2023-4220 actively exploited?

Active exploitation of CVE-2023-4220 has not been confirmed. Its EPSS score was 76.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-4220?

CVE-2023-4220 has a CVSS v3 base score of 6.1 (MEDIUM severity).

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