description: "CVE-2026-72843 is a Critical (9.8) vulnerability: The customer update route in EverShop is declared with 'access': 'public' in…. This entry ships a detection-only PoC and a Dock..." keywords: "CVE-2026-72843, CVE-2026-72843 detection, CVE-2026-72843 poc, The customer update route in EverShop is declared with "access": "public" in…"
CVE-2026-72843 — The customer update route in EverShop is declared with "access": "public" in…¶
Key facts
CVE-2026-72843 is a Critical (9.8) vulnerability: The customer update route in EverShop is declared with "access": "public" in…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-72843 |
| Severity | Critical (9.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-72843/ |
Details¶
English | 한국어
Description¶
The customer update route in EverShop is declared with "access": "public" in packages/evershop/src/modules/customer/api/updateCustomer/route.json, which causes the admin authentication middleware to call next() without checking the caller, and no customer-session middleware guards the route; the only middleware in the chain parses the JSON body. The handler in updateCustomer.js then loads the customer by the uuid taken from the URL path and writes the supplied fields back to that record, hashing a password if one is provided, without verifying that the caller owns the record. An unauthenticated request carrying a known customer uuid can therefore overwrite that customer's email address and password and read back the updated record from the 200 response, taking over the account and locking out its owner. Customer uuids are exposed through order confirmation email links and administrative URLs. Version 2.2.1 changes the route to "access": "private".
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-72843 |
| CVSS Score | 9.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-72843/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-2026-72843
# 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/evershopcommerce/evershop
- https://github.com/evershopcommerce/evershop/blob/v2.1.2/packages/evershop/src/modules/customer/api/updateCustomer/route.json
- https://github.com/evershopcommerce/evershop/blob/v2.1.2/packages/evershop/src/modules/customer/api/updateCustomer/updateCustomer.js
- https://github.com/evershopcommerce/evershop/issues/952
- https://github.com/evershopcommerce/evershop/releases/tag/v2.2.1
- https://www.vulncheck.com/advisories/evershop-missing-authorization-on-patch-api-customers-id-allows-unauthenticated-account-takeover
Generated by PoC Generator on 2026-08-22T12:03:14.551463574
Frequently asked questions¶
What is CVE-2026-72843?¶
CVE-2026-72843 is a Critical (9.8) vulnerability: The customer update route in EverShop is declared with "access": "public" in…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-72843?¶
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-2026-72843?¶
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.