CVE-2025-67263: Abacre Retail Point of Sale XSS Vulnerability

CVE-2025-67263 Overview

CVE-2025-67263 is a stored cross-site scripting (XSS) vulnerability affecting Abacre Retail Point of Sale version 14.0.0.396. The vulnerability exists within the Clients module, where the application fails to properly sanitize user-supplied input stored in the Name and Surname fields. An attacker can inject malicious HTML or JavaScript content into these fields, which is then persisted in the database and executed whenever the affected data is rendered in a user's browser.

Stored XSS vulnerabilities are particularly dangerous in point-of-sale systems as they can lead to session hijacking, credential theft, and manipulation of business-critical data. Since the malicious payload is stored server-side, it can affect multiple users who interact with the compromised records.

Critical Impact

Malicious scripts injected via the Clients module are persisted in the database and executed in the browsers of users viewing affected client records, potentially enabling session hijacking, data theft, and unauthorized actions within the POS system.

Affected Products

• Abacre Retail Point of Sale version 14.0.0.396

Discovery Timeline

• 2026-01-20 - CVE-2025-67263 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2025-67263

Vulnerability Analysis

This stored cross-site scripting vulnerability (CWE-79) arises from insufficient input validation and output encoding in the Clients module of Abacre Retail Point of Sale. When user-controlled data is entered into the Name and Surname fields, the application stores this input directly into the database without proper sanitization. Subsequently, when these records are displayed in the user interface, the stored content is rendered without adequate output encoding, allowing any embedded script content to execute in the context of the victim's browser session.

The network-based attack vector requires user interaction, as an administrator or staff member must view the compromised client record for the malicious payload to execute. Once triggered, the attacker's script runs with the same privileges as the authenticated user, potentially allowing access to sensitive business data, modification of transactions, or escalation of privileges within the POS application.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation on user-supplied data in the Clients module, combined with inadequate output encoding when rendering stored data. The Name and Surname fields accept and store arbitrary HTML and JavaScript content without sanitization, and the application does not apply context-appropriate encoding when displaying this data to users.

Attack Vector

An attacker exploits this vulnerability by creating or modifying a client record in the Abacre Retail Point of Sale system, inserting malicious JavaScript or HTML into the Name or Surname fields. The payload is stored in the application's database. When legitimate users access the Clients module and view the compromised record, the malicious script executes in their browser context.

The vulnerability is accessible over the network and requires some form of access to the client management functionality—either through compromised credentials, social engineering, or exploiting other vulnerabilities that provide access to the Clients module. The changed scope in the CVSS assessment indicates that the vulnerability can impact resources beyond the vulnerable component, as the injected scripts execute in users' browsers rather than within the application itself.

This attack could be used to steal session tokens, capture keystrokes, redirect users to phishing pages, or perform actions on behalf of authenticated users within the POS system.

Detection Methods for CVE-2025-67263

Indicators of Compromise

• Unusual HTML tags or JavaScript code present in client Name or Surname fields in the database
• Unexpected script execution or browser behavior when accessing the Clients module
• Network requests to unfamiliar external domains originating from the POS application pages
• User reports of unusual pop-ups or redirects when viewing client records

Detection Strategies

• Implement database monitoring to detect and alert on HTML or script tags stored in the Name and Surname columns of the clients table
• Deploy web application firewalls (WAF) configured to detect and block XSS payloads in form submissions
• Use browser-based security solutions that can detect and prevent inline script execution from untrusted sources
• Conduct regular security audits of stored data to identify potentially malicious content

Monitoring Recommendations

• Enable comprehensive logging for all modifications to client records in the Clients module
• Monitor for patterns consistent with XSS injection attempts in application logs
• Implement Content Security Policy (CSP) headers and monitor for CSP violation reports
• Track and investigate any unusual network activity originating from browsers accessing the POS interface

How to Mitigate CVE-2025-67263

Immediate Actions Required

• Restrict access to the Clients module to trusted users only until a patch is available
• Audit existing client records for suspicious content in Name and Surname fields and remove any malicious payloads
• Implement input validation at the web application firewall level to block script and HTML tags in form submissions
• Consider disabling or limiting the affected fields if they are not business-critical

Patch Information

As of the last update on 2026-01-20, no official patch has been released by the vendor. Organizations should monitor the Abacre Retail POS website for security updates and apply patches as soon as they become available. Additional technical details regarding this vulnerability can be found in the Packet Storm advisory.

Workarounds

• Implement strict input validation on the application server or through a reverse proxy to reject entries containing HTML or JavaScript in the Name and Surname fields
• Deploy a web application firewall with XSS detection rules enabled for the affected application
• Apply output encoding at the presentation layer if application code modifications are possible
• Restrict access to the Clients module to a minimal set of trusted users and implement additional authentication for sensitive operations
• Enable Content Security Policy (CSP) headers with strict directives to mitigate the impact of successful XSS attacks

Organizations should implement defense-in-depth measures combining input validation, output encoding, and CSP headers to reduce the risk until an official patch is released.