Is this vulnerability remotely exploitable?

Yes. An attacker who can reach the vulnerable `editinstance.php` endpoint and control the `main_database` POST parameter can attempt exploitation over the network, subject to authentication or access controls that may be in place.

Does an attacker need valid credentials to exploit this?

It depends on how Chamilo and the vchamilo plugin are configured. In many cases, editing instances is restricted to authenticated or privileged users, so an attacker might need at least some level of access. Administrators should assume that any user able to access the edit functionality could attempt to abuse it.

What is the safest general fix pattern?

Remove shell-based command construction altogether for this code path and rely on safe, parameterized APIs that do not involve the OS shell. Where system calls are absolutely necessary, pass arguments as discrete parameters and ensure that `main_database` is restricted to a tightly validated set of allowed values.

Severity:

HIGH RISK

(7.2)

OS Command Injection (CWE-78) in Chamilo vchamilo Plugin editinstance.php

CVE-2025-50196

Published:

Mar 2, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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March 7, 2026

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution via OS Command Injection

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution via OS Command Injection

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

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OS Command Injection (CWE-78) in Chamilo vchamilo Plugin editinstance.php

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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