CVE-2026-45143 — Chamilo LMS is an open-source learning management system.¶
Key facts
CVE-2026-45143 is a Critical (9.0) vulnerability: Chamilo LMS is an open-source learning management system.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-45143 |
| Severity | Critical (9.0) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-45143/ |
Details¶
English | 한국어
Description¶
Chamilo LMS is an open-source learning management system. From 2.0.0 through at least 2.1.0, Chamilo LMS stores private Message.content without server-side sanitization and renders it as HTML in assets/vue/views/message/MessageShow.vue and public/main/template/default/message/view_message.html.twig. An authenticated low-privilege user, including a student, can directly address crafted message content to an administrator because the message creation flow permits a sender to select another user as the recipient. The content executes in the recipient's browser when the recipient opens the routine inbox or message view, without requiring a link click, and can expose session credentials or permit actions as the administrator. This vulnerability is fixed in 2.0.1.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-45143 |
| Type | XSS |
| CVSS Score | 9.0 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-45143/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-45143
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://github.com/chamilo/chamilo-lms/commit/b2c91c021fc5ab7e91feb4927c4c676f77034ac5
- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x88v-rg6r-vqq6
Generated by PoC Generator on 2026-09-18T12:55:07.741107379
Frequently asked questions¶
What is CVE-2026-45143?¶
CVE-2026-45143 is a Critical (9.0) vulnerability: Chamilo LMS is an open-source learning management system.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-45143?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-45143?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.