Is this vulnerability remotely exploitable over the internet?

Yes, if the Chamilo LMS instance is exposed over the internet and an attacker can obtain any valid user account with course access, they can exploit the issue via crafted HTTP requests to the vulnerable endpoint.

Does an attacker need elevated privileges (like instructor or admin) to exploit this?

No. Any authenticated user enrolled in a course that uses Learning Paths can attempt to change the `uid` parameter and affect other learners' progress, making this a horizontal privilege escalation issue among peers.

What is the safest general fix pattern for this kind of bug?

Derive the effective user identity from the authenticated session or token rather than trusting client-supplied IDs, and enforce server-side authorization checks whenever an operation reads, updates, or deletes resources associated with a specific user.

Severity:

HIGH RISK

(7.1)

Insecure Direct Object Reference (CWE-639) in Chamilo LMS Learning Path Progress Endpoint

CVE-2026-33702

Published:

Apr 10, 2026

Status:

Received

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Insecure Direct Object Reference (IDOR)

CWE:

CWE-639

Impact:

Integrity Violation of Learning Records and Grade Tampering

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Insecure Direct Object Reference (IDOR)

CWE:

CWE-639

Impact:

Integrity Violation of Learning Records and Grade Tampering

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Insecure Direct Object Reference (CWE-639) in Chamilo LMS Learning Path Progress Endpoint

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

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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