CVE-2026-0551 — The PPWP – Password Protect Pages plugin for WordPress is vulnerable to PHP Object…¶
Key facts
CVE-2026-0551 is a High (8.8) vulnerability: The PPWP – Password Protect Pages plugin for WordPress is vulnerable to PHP Object…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-0551 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-0551/ |
Details¶
English | 한국어
Description¶
The PPWP – Password Protect Pages plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.9.18 via deserialization of untrusted input from the 'post_protection_roles' vulnerable parameter. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-0551 |
| CVSS Score | 8.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-0551/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-2026-0551
# 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://plugins.trac.wordpress.org/browser/password-protect-page/trunk/includes/services/class-ppw-passwords.php#L699
- https://plugins.trac.wordpress.org/changeset/3567221/password-protect-page
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b8f53282-740e-4ac3-a2e1-7a97893e3355?source=cve
Generated by PoC Generator on 2026-08-23T11:20:12.521031876
Frequently asked questions¶
What is CVE-2026-0551?¶
CVE-2026-0551 is a High (8.8) vulnerability: The PPWP – Password Protect Pages plugin for WordPress is vulnerable to PHP Object…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-0551?¶
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-2026-0551?¶
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.