Is this vulnerability remotely exploitable over the internet?

Yes. If a remote user can supply or influence the serialized data that Chamilo deserializes, exploitation can occur over standard web interfaces without local access, subject to how the application exposes the vulnerable endpoints.

Does an attacker need authentication to exploit this issue?

It depends on where the deserialization occurs. If the vulnerable code processes data tied to logged-in sessions or user profiles, an attacker may need at least a low-privileged account. If any anonymous endpoints or cookies allow serialized data from unauthenticated users, exploitation may be possible without authentication.

What is the safest general fix pattern for this class of vulnerability?

The most robust fix is to avoid deserializing attacker-influenced objects at all. Replace object deserialization with data-only parsing (e.g., JSON or structured arrays), ensure that any remaining serialized data comes only from trusted, server-controlled sources, and remove gadget-like behaviors from classes that participate in deserialization.

Severity:

CRITICAL RISK

(9.8)

Unsafe Deserialization (CWE-502) in Chamilo Learning Management System

CVE-2025-52998

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

Recent Vulnerabilities

CWE-78

CRITICAL RISK

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Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

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

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Unsafe Deserialization

CWE:

CWE-502

Impact:

Remote Code Execution and Application Logic Compromise

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Unsafe Deserialization

CWE:

CWE-502

Impact:

Remote Code Execution and Application Logic Compromise

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Unsafe Deserialization (CWE-502) in Chamilo Learning Management System

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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