CVE-2019-18873

CriticalCVSS 9.0/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.0/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-78 CWE-79

Affected software

No affected versions have been published.

Timeline

Published: Nov 12, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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