CVE-2023-3368Public exploitNetwork attack vector

Unauthenticated code execution via incomplete shell filtering

Published Nov 28, 2023 · Updated Jun 3, 2025

OS command injection in Chamilo LMS 1.11.20 and earlier allows remote attackers to execute code through the PPT conversion web service. The wsConvertPpt function inserts filename-derived paths into a command passed to exec() after a denylist strips only backticks, semicolons, ampersands, and pipes, leaving $() substitution and newlines effective. Reaching the public SOAP endpoint requires no authentication and grants command execution with the web-service process's privileges.

CVSS severity9.8
Critical
EPSS probability69.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Chamilo LMS 1.11.20 and earlier allows remote attackers to execute code through the PPT conversion web service. The wsConvertPpt function inserts filename-derived paths into a command passed to exec() after a denylist strips only backticks, semicolons, ampersands, and pipes, leaving $() substitution and newlines effective. Reaching the public SOAP endpoint requires no authentication and grants command execution with the web-service process's privileges.

The record

CVE
CVE-2023-3368
Published
Nov 28, 2023
Updated
Jun 3, 2025
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-78, CAPEC-88, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.11.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chamilo · Chamilo LMSversion=0 <=1.11.20

Published CVSS scores

9.8STAR Labs SG Pte. Ltd.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-88OS Command Injection
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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