CVE-2023-3368 — Command injection in `/main/webservices/additional_webservices

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Chamilo	Chamilo	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

08Timeline

• Published: 2023-11-28T07:05:26.659Z
• Last modified: 2025-06-03T13:58:32.131Z

09References

• support.chamilo.org — https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-121-2…
• starlabs.sg — https://starlabs.sg/advisories/23/23-3368/
• github.com — https://github.com/chamilo/chamilo-lms/commit/37be9ce7243a30259047dd4517c48ff8b2…
• https: — https://https://github.com/chamilo/chamilo-lms/commit/4c69b294f927db62092e01b70a…