CVE-2021-27315 — AI Deep Analysis Summary

🚨 **Essence**: Blind SQL Injection in `contactus.php`. 💥 **Consequences**: Attackers can inject malicious SQL queries via the **comment** parameter.…

🛡️ **Root Cause**: Improper input validation. 🐛 **Flaw**: The **name** and **email** parameters (specifically **comment**) are not sanitized. This allows raw SQL code to be executed by the database engine.

📦 **Affected**: Sourcecodesterk **Doctor Appointment System**. 📌 **Version**: **v1.0**. ⚠️ **Component**: The `contactus.php` module handling appointment/contact forms.

🕵️ **Hackers Can**: Extract database contents. 🗄️ **Data Risk**: Access user credentials, appointment details, and sensitive patient info. 📈 **Privilege**: Remote unauthenticated access to backend data.

🔓 **Threshold**: **LOW**. 🚫 **Auth**: **Unauthenticated**. Anyone visiting the site can exploit this via the contact form. No login required to trigger the injection.

📜 **Public Exp?**: **YES**. 🧪 **PoC**: Available via Nuclei templates & PacketStorm. 🌐 **Wild Exp**: High risk due to simple, documented exploitation methods.

🔍 **Self-Check**: Scan for `contactus.php` in v1.0. 📡 **Tools**: Use Nuclei or SQLMap targeting the **comment** parameter. 🚩 **Indicator**: Look for time-based delays or error responses indicating blind injection.

🩹 **Official Fix**: **UNKNOWN**. 📅 **Date**: Published 2021-03-24. The data does not confirm a vendor patch. Assume **unpatched** unless verified otherwise.

🛑 **Workaround**: Disable or restrict the **contact form**. 🧱 **Defense**: Implement WAF rules to block SQL keywords in the **comment** field. 🚫 **Input**: Strictly sanitize/escape all user inputs.

⚡ **Urgency**: **HIGH**. 🚨 **Priority**: Critical. Since it is unauthenticated and blind, it is easily exploitable. Patch immediately or apply strict input validation.