Vulnerability · Published Dec 20, 2021 · Assigned by mitre
CVE-2021-43437
High 8.8
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).
Official description
In sourcecodetester Engineers Online Portal as of 10-21-21, an attacker can manipulate the Host header as seen by the web application and cause the application to behave in unexpected ways. Very often multiple websites are hosted on the same IP address. This is where the Host Header comes in. This header specifies which website should process the HTTP request. The web server uses the value of this header to dispatch the request to the specified website. Each website hosted on the same IP address is called a virtual host. And It's possible to send requests with arbitrary Host Headers to the first virtual host.
Affected products (as reported)
References
- https://portswigger.net/web-security/host-header x_refsource_MISC
- https://medium.com/%40mayhem7999/cve-2021-43437-5c5e3b977e84 x_refsource_MISC