---
id: CVE-2025-40806
title: >-
  A vulnerability has been identified in Gridscale X Prepay (All versions <
  V4.2.1)
summary: >-
  A vulnerability has been identified in Gridscale X Prepay (All versions <
  V4.2.1). The affected application is vulnerable to user enumeration due to
  distinguishable responses. This could allow an unauthenticated remote attacker
  to determ…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-204
vendor: siemens
product: gridscale_x_prepay
affected:
  - gridscale_x_prepay < 4.2.1
patched:
  - gridscale_x_prepay 4.2.1
published: '2025-12-09'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-40806'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-356310.html'
    label: productcert@siemens.com
tags:
  - nvd
epss: 0.00456
epssPercentile: 0.37487
ingestedAt: '2026-10-07T20:46:46.789Z'
---

## Overview

A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to user enumeration due to distinguishable responses. This could allow an unauthenticated remote attacker to determine if a user is valid or not, enabling a brute force attack with valid users.

## Affected

- `gridscale_x_prepay < 4.2.1`

## Remediation

Upgrade past the affected range:

- `gridscale_x_prepay 4.2.1`