External risk intelligence

Miantang/IoT-PHP SQL Injection Vulnerability Affects Authentication

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-71237

The vulnerability exists in a login route (POST /userlogin) of a web application. Web applications and their authentication endpoints are typically designed to be internet-facing or externally reachable to facilitate user access, making this a commonly exposed service surface.

SQL Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in the login functionality of the IoT-PHP web application, specifically within its index.php file. This flaw allows unauthenticated attackers to bypass login by manipulating the password field, potentially leading to unauthorized access and the extraction of sensitive data from the database. The exposure of this login mechanism to external networks heightens the risk of exploitation.

Login bypass through vulnerable password handling.
Confirms potential external access to sensitive data.
Verify if this login system is in use.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending a specially crafted password to the user login form. The application fails to properly clean the password input before using it in a database query. This allows an unauthenticated attacker to manipulate the query to bypass login and potentially access or modify sensitive information within the database.

No authentication required.
Submit crafted password via login form.
Bypass authentication, access database data.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to bypass login authentication and extract arbitrary data from the database by exploiting a SQL injection flaw in the password field of the login route.

User credentials and database contents at risk.
Exploited via crafted POST request to the login route.
Enables unauthorized data access and system compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This SQL injection vulnerability in the IoT-PHP login route requires immediate attention from teams managing web applications and their underlying infrastructure. The first step is to identify all instances of this software, determine their exposure and criticality, and then assign ownership for remediation planning.

Application owners should identify affected systems.
Verify reachability and business criticality.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Miantang/IoT-PHP?

Miantang/IoT-PHP is a lightweight web application framework designed for managing IoT-related data and device interactions. It typically serves as a backend management interface for connected devices, providing web-based login portals to handle administrative tasks and user sessions.

What does CVE-2026-71237 mean?

This CVE identifies a SQL injection weakness (CWE-89) in the software's login process. Because the application processes password input without cleaning it, an attacker can input database commands instead of a standard password, tricking the system into executing unauthorized queries.

How is this SQL injection triggered?

The vulnerability is triggered by sending a malicious POST request to the application's login route. It is important to note that this bug specifically resides in the password field handling; simply visiting the login page or submitting a valid username without the crafted password string does not trigger the unauthorized database access.

Do I need to worry about this vulnerability?

Yes, if your instance of the software is reachable over a network. According to Halo Surface Signal, this vulnerability exists in a login route, which is frequently designed to be internet-facing for user access. If your setup allows external connections to the login portal, the risk of unauthorized database interaction is significantly higher.

When should I take action for this CVE?

You should prioritize this immediately by locating all deployed instances of IoT-PHP within your environment. Once identified, evaluate whether these systems are critical or internet-exposed, and work with your technical team to restrict access or apply updates to ensure the login mechanism properly validates all input.

References

github.com/Miantang/IoT-PHP

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.