CVE-2026-52771 — YesWiki is a wiki system written in PHP.¶
Key facts
CVE-2026-52771 is a High (8.3) vulnerability: YesWiki is a wiki system written in PHP.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-52771 |
| Severity | High (8.3) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-52771/ |
Details¶
English | 한국어
Description¶
YesWiki is a wiki system written in PHP. From version 4.2.0 to before version 4.6.6, ApiController::deletePage() interpolates a page tag retrieved from the database into a DELETE FROM …_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/{tag} API accepts arbitrary URL-encoded values, including single quotes, and stores them. A low-privilege authenticated user can therefore create a page whose tag is a SQL fragment, make the page non-orphaned via the standard {{include page="…"}} link mechanism, and then invoke the delete endpoint to execute arbitrary SQL inside the wiki database - including time-based blind data exfiltration from any table. This issue has been patched in version 4.6.6.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-52771 |
| Type | SQLI |
| CVSS Score | 8.3 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-52771/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-2026-52771
# 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/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631
- https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg
Generated by PoC Generator on 2026-09-05T10:46:22.119830559
Frequently asked questions¶
What is CVE-2026-52771?¶
CVE-2026-52771 is a High (8.3) vulnerability: YesWiki is a wiki system written in PHP.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-52771?¶
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-2026-52771?¶
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.