Session Hijacking

Session Hijacking

By Rohit Gautam
Session Hijacking

Summary: Session Hijacking is a significant web security vulnerability that occurs when an attacker gains unauthorized access to a user's session by stealing or impersonating their session identifier. By exploiting this vulnerability, an attacker can impersonate the user, access sensitive information, or perform malicious actions within the user's session.

Severity: High

Attack Vector: Remote

Complexity: Low

Impact: By successfully hijacking a user's session, an attacker can gain unauthorized access to the user's account, perform actions on their behalf, access sensitive data, or manipulate the application's functionality.

Affected IP Address:

Port: 443

Steps to Reproduce:

1. Identify the target system vulnerable to session hijacking.
2. Monitor network traffic or analyze cookies to obtain a valid session identifier.
3. Intercept the user's session identifier through techniques such as packet sniffing, cross-site scripting (XSS), or session sidejacking.
4. Use the stolen session identifier to impersonate the user and gain unauthorized access to their session.
5. Perform actions within the hijacked session, access sensitive information, or manipulate the application's functionality.


To mitigate Session Hijacking vulnerabilities, consider the following recommendations:
1. Implement secure session management techniques, including unique and unpredictable session identifiers, session timeouts, and secure session handling.
2. Use HTTPS (SSL/TLS) to encrypt the communication between the user's browser and the server, preventing session identifier theft through network eavesdropping.
3. Implement additional security measures such as multi-factor authentication (MFA) or token-based authentication to strengthen user authentication.
4. Regularly monitor and analyze server logs for suspicious activity related to session hijacking.
5. Educate users about the risks of session hijacking and advise them to avoid accessing sensitive information over unsecured networks.

1. OWASP - Session Hijacking: 
2. PortSwigger - Session Hijacking:

Proof of Concept:

Please refer to the attached screenshot or video for a visual demonstration of a Session Hijacking vulnerability.