CVE-2026-100673 — The Grav Data Manager plugin (getgrav/grav-plugin-datamanager) versions 1.0.1 through…¶

Key facts

CVE-2026-100673 is a High (8.2) vulnerability: The Grav Data Manager plugin (getgrav/grav-plugin-datamanager) versions 1.0.1 through…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-100673
Severity	High (8.2)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-100673/

Details¶

English | 한국어

Description¶

The Grav Data Manager plugin (getgrav/grav-plugin-datamanager) versions 1.0.1 through 1.4.4 render stored data entries in the item-detail view (admin/templates/partials/item.html.twig) without escaping, applying Twig's raw filter — in some cases after a striptags('
') call that PHP's strip_tags() bypasses by preserving allowed tags together with their attributes. An unauthenticated visitor who submits a front-end form whose submissions are saved to user/data can store an HTML payload that executes as JavaScript in the session and origin of an administrator who later opens that entry in the classic admin panel, running with that administrator's privileges and CSRF token. Execution occurs without further interaction for list values (such as checkbox or multi-select fields) and on hover for ordinary text fields. Sites using the Grav 2.0 Admin Next interface are not affected, because it renders the same data through a separate, correctly escaping code path. The issue is fixed in Data Manager 1.4.5.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-100673
Type	XSS
CVSS Score	8.2

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-100673/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-2026-100673

# 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/getgrav/grav/security/advisories/GHSA-863q-9v8v-m9fv
https://www.vulncheck.com/advisories/grav-data-manager-before-1.4.5-stored-xss-via-item-detail-view

Generated by PoC Generator on 2026-09-27T03:04:35.539067369

Frequently asked questions¶

What is CVE-2026-100673?¶

CVE-2026-100673 is a High (8.2) vulnerability: The Grav Data Manager plugin (getgrav/grav-plugin-datamanager) versions 1.0.1 through…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-100673?¶

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-2026-100673?¶

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.