CVE-2019-18839

critical

Description

FUDForum 3.0.9 is vulnerable to Stored XSS via the nlogin parameter. This may result in remote code execution. An attacker can use a user account to fully compromise the system using a POST request. When the admin visits the user information, 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.

References

https://packetstormsecurity.com/files/155261/FUDForum-3.0.9-Code-Execution-Cross-Site-Scripting.html

https://github.com/fuzzlove/FUDforum-XSS-RCE

Details

Source: Mitre, NVD

Published: 2019-11-13

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 9

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

Severity: Critical

EPSS

EPSS: 0.01908