A serious security issue has been discovered in Vite, a widely used tool for building web applications. This flaw, identified as CVE-2025-30208, allows attackers to access restricted files on a server. If exploited, it could lead to leaks of sensitive data and potential security risks.  

How the Vulnerability Works  

Vite’s development server is designed to block access to certain files, ensuring that only permitted content is available. However, researchers have found a way to bypass these restrictions using specific URL parameters. By adding "?raw??"or "?import&raw??" to a web address, hackers can trick the system into providing access to protected files.  

Who Is at Risk?  

This issue only affects developers who have made their Vite development server accessible over the internet. Normally, this server is used for local testing, but some developers configure it to be available outside their network using options like “–host” or “server.host.” If a server is open in this way, attackers can use the vulnerability to retrieve private information.  

How Hackers Can Exploit This Flaw  

The problem occurs because Vite handles web addresses incorrectly. In some parts of the system, special characters like “?” are removed, while other parts fail to detect these changes. This inconsistency allows hackers to bypass security restrictions and gain access to files they should not be able to see.  

A Proof-of-Concept (PoC) exploit has already been released, showing how attackers can use this flaw to steal sensitive data. For example, one attack method attempts to read the “.bash_history” file, which can contain records of past commands, stored passwords, and other important details.  

Affected Versions  

This security weakness is present in several versions of Vite, including:  

• 6.2.0 to 6.2.2  

• 6.1.0 to 6.1.1  

• 6.0.0 to 6.0.11  

• 5.0.0 to 5.4.14  

• All versions before 4.5.9  

How to Stay Safe  

To protect against this threat, developers using affected versions of Vite should update immediately to a secure version. The patched versions are:  

• 6.2.3 and newer 

• 6.1.2 and newer  

• 6.0.12 and newer  

• 5.4.15 and newer 

• 4.5.10 and newer  

Additionally, it is best to avoid exposing Vite’s development server to the internet unless absolutely necessary. Keeping development environments private reduces the risk of attacks and protects sensitive data.  

This vulnerability is a reminder that keeping software up to date is essential for security. Developers should act quickly to install the latest patches and ensure their applications remain protected from cyber threats.