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Vulnerability record · CVE-2025-66921 · published 17 December 2025

CVE-2025-66921: Opensourcepos open source point of sale improper input validation vulnerability

Opensourcepos · Open Source Point Of Sale

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

7.2 CVSS 3.1 High EPSS 0.55% · top 56.1% CWE-20 · Improper input validationCWE-79 · Cross-site scripting
7.2CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/omkaryepre/vulnerability-research/blob/main/CVE-2025-66921/readme.md ExploitThird Party Advisory
https://github.com/opensourcepos/opensourcepos Product
https://github.com/omkaryepre/vulnerability-research/blob/main/CVE-2025-66921/readme.md ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-32888Opensourcepos open source point of sale sql injection vulnerabilityOpen Source Point of Sale is a web based point-of-sale application written in PHP using CodeIgniter framework. Versions contain an SQL Injection in t…EPSS 0.46%8.8CVE-2026-26746Opensourcepos open source point of sale unrestricted file upload vulnerabilityOpenSourcePOS 3.4.1 contains a Local File Inclusion (LFI) vulnerability in the Sales.php::getInvoice() function. An attacker can read arbitrary files…EPSS 0.82%8.8CVE-2025-68434Opensourcepos open source point of sale cross-site request forgery vulnerabilityOpen Source Point of Sale (opensourcepos) is a web based point of sale application written in PHP using CodeIgniter framework. Starting in version 3.…EPSS 0.28%8.1CVE-2025-68147Opensourcepos open source point of sale cross-site scripting vulnerabilityOpen Source Point of Sale (opensourcepos) is a web based point of sale application written in PHP using CodeIgniter framework. Starting in version 3.…EPSS 0.38%7.5CVE-2025-63800Opensourcepos open source point of sale weak password requirements vulnerabilityThe password change endpoint in Open Source Point of Sale 3.4.1 allows users to set their account password to an empty string due to missing server-s…EPSS 0.45%7.4CVE-2025-70093Opensourcepos open source point of sale command injection vulnerabilityAn issue in OpenSourcePOS v3.4.1 allows attackers to execute arbitrary code via returning a crafted AJAX response.EPSS 0.36%7.2CVE-2025-66923Opensourcepos open source point of sale improper input validation vulnerabilityA Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitra…EPSS 0.55%7.2CVE-2022-34578Opensourcepos open source point of sale unrestricted file upload vulnerabilityOpen Source Point of Sale v3.3.7 was discovered to contain an arbitrary file upload vulnerability via the Update Branding Settings page.EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2025-66921), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.