# [Vertical/Horizontal] Insecure Direct Object Reference (IDOR) in "this" Parameter on "this-endpoint"
## Summary
An Insecure Direct Object Reference (IDOR) vulnerability has been identified in the [change-this] application. This vulnerability could allow [type(auth/unauth)] users to access sensitive data or perform actions on behalf of other users.

The **type** of user could [(delete/read/change)] the **victim-user-type**'s **object**.

## Vulnerability Details
- **Vulnerability Type:** Insecure Direct Object Reference (IDOR)
- **Affected System:** XYZ Application
- **Vulnerable Endpoint:** [Endpoint URL]
- **Parameter**:

## Description
The vulnerability exists due to inadequate access controls in the application, allowing attackers to directly access and manipulate objects without proper authorization. Specifically, by modifying parameters or manipulating requests, attackers can access resources or perform actions that should be restricted to other users.

## Impact
This vulnerability could potentially lead to unauthorized access to sensitive information, manipulation of user data, or unauthorized actions within the application. It poses a significant risk to the confidentiality, integrity, and availability of the system and its data.

## Proof of Concept (PoC)
1. **Description**
   - Upon analyzing the application, it was discovered that the application does not enforce proper authorization controls.
2. **Steps to Reproduce**
   1. Log in to the application with a valid user account.
   2. Navigate to [specific endpoint or resource].
   3. Intercept the request and modify the parameters, such as object IDs, to access resources belonging to other users.
   4. Submit the modified request.
   5. Access to unauthorized resources or actions will be granted without proper authorization checks.

## Recommendations for Mitigation
To mitigate the identified vulnerability, the following steps are recommended:

1. **Implement Proper Access Controls**
   - Ensure that access controls are properly enforced throughout the application to prevent unauthorized access to sensitive resources.

2. **Use Indirect Object References**
   - Utilize indirect object references or access control lists to ensure that users can only access resources they are authorized to access.

3. **Implement Input Validation and Sanitization**
   - Validate and sanitize user input to prevent injection attacks and ensure that users cannot manipulate parameters to access unauthorized resources.

4. **Regular Security Assessments**
   - Conduct regular security assessments and code reviews to identify and remediate vulnerabilities proactively.

5. **Educate Developers and Users**
   - Educate developers about secure coding practices and train users about potential security risks such as phishing attacks or unauthorized access attempts.

## Timeline
- **[Date]:** Vulnerability discovered.
- **[Date]:** Vulnerability reported to the XYZ application security team.
- **[Date]:** XYZ application security team acknowledged the report.
- **[Date]:** XYZ application security team confirmed the vulnerability and initiated mitigation efforts.
- **[Date]:** Vulnerability patched and fixes deployed.
- **[Date]:** Public disclosure of the vulnerability.