Overview
The cybersecurity world is always on the lookout for vulnerabilities that can lead to potential system compromise or data leakage. One such vulnerability, identified as CVE-2025-49029, has been found in bitto.Kazi’s Custom Login And Signup Widget. This vulnerability affects all versions of the widget up to and including version 1.0. An attacker exploiting this vulnerability can inject malicious code into the system, potentially leading to severe impacts such as unauthorized access, data leakage, or even full system compromise.
Vulnerability Summary
CVE ID: CVE-2025-49029
Severity: Critical (9.1 CVSS score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Product | Affected Versions
bitto.Kazi Custom Login And Signup Widget | Up to and including 1.0
How the Exploit Works
This vulnerability arises due to insufficient sanitization of user inputs in the Custom Login And Signup Widget. An attacker can exploit this vulnerability by injecting malicious code into the input fields of the widget. This code gets executed when the form is processed by the server, leading to potential unauthorized access, data leakage, or full system compromise.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. This is a simple HTTP POST request where the attacker sends a malicious payload to the vulnerable endpoint:
POST /login HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "username": "admin", "password": "<img src=x onerror=alert('Injected')>" }In this example, the attacker injects a simple JavaScript code in the password field that triggers an alert when the form is processed by the server. In a real-world scenario, this could be replaced with a more harmful script, potentially leading to severe impacts.
Mitigation and Prevention
Until the vendor releases a patch to fix this vulnerability, users are advised to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. These tools can detect and prevent code injection attacks, reducing the risk of exploitation. Users should also consider using input validation techniques to prevent the execution of malicious scripts.
