CVE-2023-3368: Chamilo LMS Unauthenticated Command Injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 69.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-11-28 · updated 2026-06-17
Weakness: CWE-78

Description

Command injection in `/main/webservices/additional_webservices.php` in Chamilo LMS <= v1.11.20 allows unauthenticated attackers to obtain remote code execution via improper neutralisation of special characters. This is a bypass of CVE-2023-34960.

Affected products

Chamilo: before 1.11.20 — fixed in 1.11.20

How to fix

Upgrade to a fixed version: Chamilo 1.11.20. Check the vendor advisory for mitigations.

References

https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657a
https://https://github.com/chamilo/chamilo-lms/commit/4c69b294f927db62092e01b70ac9bd6e32d5b48b
https://starlabs.sg/advisories/23/23-3368/
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-121-2023-07-05-Critical-impact-High-risk-Unauthenticated-Command-Injection-CVE-2023-3368
https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b21d657a
https://https://github.com/chamilo/chamilo-lms/commit/4c69b294f927db62092e01b70ac9bd6e32d5b48b
https://starlabs.sg/advisories/23/23-3368/
https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-121-2023-07-05-Critical-impact-High-risk-Unauthenticated-Command-Injection-CVE-2023-3368

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