Imagine you are connected to a public network, checking emails or accessing your company's dashboard. Everything seems normal. But there are someone more connected with you. You don't see his face, you don't hear his keyboard, but he's there. And, in a matter of seconds, it can take control of your session, without needing to know your password. That's the session hijacking, also known as session hijacking.
This type of attack has become more common and sophisticated, affecting both individual users and companies of all sizes. Worst of all, it often goes unnoticed until it is too late.
How does session hijacking work?
The principle is simple: when you connect to a website, the site generates a session to identify you and keep you authenticated while you browse. This session is usually linked to a cookie or token. If an attacker manages to intercept or spoof that identifier, they can act on your behalf without having direct access to your password.
The most common ways in which this occurs include:
- SniffingData capture: capture of unencrypted data on public Wi-Fi networks.
- Cookie Theftthrough malicious scripts or browser extensions.
- Session fixationThe attacker forces the user to use a predefined session ID.
- Cross-site scripting (XSS)malicious code insertion in trusted pages.
- Man-in-the-middle (MITM)interception of data between the user and the server, especially in unencrypted connections.
Why is it so dangerous for companies?
Because it not only compromises a user's information, but also opens the door to internal tools, administration panels, customer accounts or critical services. All without the system detecting a “suspicious” login, since the stolen session is legitimate.
An employee working from a cowork, a manager using Wi-Fi at the airport and even a supplier accessing from home are common scenarios in which this risk materializes.
What you can do today to protect yourself
You don't need to change your entire infrastructure to stay one step ahead. It is enough to apply clear and consistent practices:
1. Always use HTTPS (and verify that it is active).
It is not enough for a site to be “secure”. Make sure that all the pages (not only the login) are under HTTPS. Browsing sites that mix encrypted and non-encrypted content (mixed content) is an open door to intercept sessions.
2. Prioritize private networks or use VPN
Avoid connecting to unprotected public Wi-Fi networks. If there is no alternative, use a VPN encrypt all traffic from your device. This blocks access to those attempting to intercept your data packets.
3. Close your sessions, always
It seems basic, but many people simply close the browser tab. That leaves the session active. Be sure to click “Logout” when you're done, especially on critical or banking services.
4. Implement automatic session expiration
In corporate environments, it is essential to define maximum inactivity times to automatically close sessions. This reduces the exposure time in case of hijacking.
5. Check the security alerts of your platforms.
Many applications send notifications when there is a new session, from another device or location. Turn on all available alerts and check them regularly.
6. Minimize the use of browser extensions.
Some extensions have excessive permissions that can compromise your session. Use only the essential ones, from verified sources, and always keep them updated.
What you should not forget
Session hijacking does not require advanced techniques or a large budget on the part of the attacker. All it takes is a small vulnerability, an insecure network or an oversight and it can have a devastating impact.
It is not about living with digital paranoia, but about assuming responsible habits that allow you to operate with peace of mind. You and your team can work from wherever you are, as long as you do it with judgment and protection.
At MasterBase® we are prepared and have the platform to help you, in a simple, effective and low cost way, to automate your business processes safely from the design stage. In addition, you can request the support of a consultant to help you define and execute an automated process aligned to your needs. This way you not only reduce risks, but also make every digital step you take more efficient.
