CVE-2019-18873 Information

Description

FUDForum 3.0.9 is vulnerable to Stored XSS via the User-Agent HTTP header. This may result in remote code execution. An attacker can use a user account to fully compromise the system via a GET request. When the admin visits user information under \User Manager\ in the control panel the payload will execute. This will allow for PHP files to be written to the web root and for code to execute on the remote server. The problem is in admsession.php and admuser.php.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Reference

https://github.com/fuzzlove/FUDforum-XSS-RCE https://sourceforge.net/p/fudforum/code/6321/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.0