CVE-2025-70095
📋 TL;DR
This cross-site scripting (XSS) vulnerability in OpenSourcePOS v3.4.1 allows attackers to inject malicious scripts into item management and sales invoice functions. When exploited, it enables execution of arbitrary web scripts or HTML in users' browsers. Any organization using the vulnerable version of OpenSourcePOS is affected.
💻 Affected Systems
- OpenSourcePOS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, deface the application, or perform actions on behalf of authenticated users, potentially leading to data theft or financial fraud.
Likely Case
Attackers inject malicious scripts to steal session cookies or credentials, potentially gaining unauthorized access to the POS system and sensitive sales data.
If Mitigated
With proper input validation and output encoding, the impact is limited to minor UI disruption without data compromise.
🎯 Exploit Status
Exploitation requires access to item management or sales invoice functions, typically requiring some level of authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub repository for latest version > v3.4.1
Vendor Advisory: https://github.com/opensourcepos/opensourcepos
Restart Required: No
Instructions:
1. Backup current installation and database. 2. Download latest OpenSourcePOS version from GitHub. 3. Replace vulnerable files with patched versions. 4. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize user inputs in item management and sales invoice functions.
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution sources.
🧯 If You Can't Patch
- Disable or restrict access to item management and sales invoice functions for untrusted users.
- Implement web application firewall (WAF) rules to block XSS payload patterns.
🔍 How to Verify
Check if Vulnerable:
Check if running OpenSourcePOS v3.4.1 by examining version files or admin interface.Check Version:
Check version.php file or admin dashboard for version information.Verify Fix Applied:
Test item management and sales invoice functions with XSS payloads to ensure they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns in item names or invoice fields containing script tags or JavaScript code
Network Indicators:
- HTTP requests with suspicious parameters containing script elements
SIEM Query:
web_requests WHERE (uri CONTAINS 'item' OR uri CONTAINS 'invoice') AND (params CONTAINS '<script' OR params CONTAINS 'javascript:')