---
id: CVE-2025-66923
title: >-
  A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in
  Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary
  web script or HTML via the phone_number parameter.
summary: >-
  A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in
  Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary
  web script or HTML via the phone_number parameter.
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
  - CWE-79
vendor: opensourcepos
product: open_source_point_of_sale
affected:
  - open_source_point_of_sale = 3.4.1
published: '2025-12-17'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66923'
references:
  - url: >-
      https://github.com/omkaryepre/vulnerability-research/blob/main/CVE-2025-66923/readme.md
    label: cve@mitre.org
  - url: 'https://github.com/opensourcepos/opensourcepos'
    label: cve@mitre.org
  - url: >-
      https://github.com/omkaryepre/vulnerability-research/blob/main/CVE-2025-66923/readme.md
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00552
epssPercentile: 0.44546
ingestedAt: '2026-10-13T11:23:51.120Z'
---

## Overview

A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary web script or HTML via the phone_number parameter.

## Affected

- `open_source_point_of_sale = 3.4.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.