Winmail · Winmail · CVE-2020-23776
Name of the Vulnerable Software and Affected Versions:
Winmail version 6.5
Description:
A Server-Side Request Forgery (SSRF) issue exists in the app.php file, specifically in the `key` parameter when HTTPS is enabled. This allows an attacker to manipulate the server into sending a request to a specific URL. Furthermore, an attacker can modify the `HOST` value in the request header to control where the server sends the request.
Recommendations:
For Winmail version 6.5, as a temporary workaround, consider restricting access to the `app.php` file or disabling the `key` parameter when HTTPS is on until a patch is available. Additionally, restrict modifications to the `HOST` header value to prevent unauthorized requests.