# OpenSolution Quick.Cart v6.7 contains reflected XSS and authenticated RCE vulnerabilities…

Published: 2026-01-22 · Severity: high · Sectors: retail
Canonical: https://vorant.io/reports/c2d0f975-0baa-4343-979e-0896ddd2b7c1/opensolution-quick-cart-v6-7-contains-reflected-xss-and-authenticated-rce

> OpenSolution Quick.Cart v6.7 contains reflected XSS and authenticated RCE vulnerabilities allowing code execution via file upload and path traversal.

CERT Polska coordinated disclosure of two vulnerabilities in OpenSolution Quick.Cart e-commerce software. CVE-2025-67683 is a reflected cross-site scripting vulnerability exploitable via a crafted URL containing malicious JavaScript in the sSort parameter. CVE-2025-67684 is a more critical authentication-required vulnerability combining local file inclusion, path traversal, and inadequate file upload validation that permits privileged attackers to upload and execute arbitrary PHP code, achieving remote code execution on the hosting server.

Version 6.7 was confirmed vulnerable through testing. The vendor was notified early in the disclosure process but did not provide information about affected version ranges or remediation timelines. Other versions remain untested and may also be vulnerable. Organizations running Quick.Cart should assume risk until vendor patches are available.

The vulnerabilities were responsibly reported by researcher Arkadiusz Marta through CERT Polska's coordinated vulnerability disclosure program.

## Mentioned in this report

- Vulnerabilities: CVE-2025-67683, CVE-2025-67684

## Detection guidance (public sample)

### Quick.Cart Reflected XSS Attempt via sSort Parameter

ATT&CK: T1190

Detects HTTP requests containing script/javascript payloads in the sSort parameter, indicative of CVE-2025-67683 reflected XSS exploitation attempts against Quick.Cart. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.

```yaml
title: Quick.Cart Reflected XSS Attempt via sSort Parameter
logsource:
  category: proxy
  product: null
detection:
  selection:
    cs-uri-query|contains:
    - sSort=
  xss_pattern:
    cs-uri-query|contains:
    - <script
    - 'javascript:'
    - onerror=
    - onload=
    - '%3Cscript'
  condition: selection and xss_pattern
falsepositives:
- Security scanning tools testing for XSS vulnerabilities
- Automated vulnerability scanners probing the sSort parameter
level: medium
tags:
- attack.t1190
- attack.t1203
id: f11a54fa-4ce8-5c0f-8dbf-0216028511dd
status: experimental
author: Vorant
```

### PHP Webshell File Written by Web Server Process

ATT&CK: T1505.003

Detects a PHP file being created within a web application's upload or media directory by a web server or PHP process, consistent with exploitation of file upload validation flaws such as CVE-2025-67684 to plant a webshell. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.

```yaml
title: PHP Webshell File Written by Web Server Process
logsource:
  category: file_event
  product: windows
detection:
  selection:
    Image|endswith:
    - \httpd.exe
    - \php-cgi.exe
    - \php-fpm.exe
    - \w3wp.exe
    - \nginx.exe
    TargetFilename|contains:
    - \upload\
    - \uploads\
    - \media\
    - \files\
    TargetFilename|endswith:
    - .php
    - .phtml
    - .php5
  filter:
    TargetFilename|contains:
    - \vendor\
    - \wp-content\plugins\
  condition: selection and not filter
falsepositives:
- Legitimate CMS or plugin update processes writing PHP files to upload directories
- Developer deployment scripts pushing PHP application code via the web server account
level: high
tags:
- attack.t1505.003
- attack.t1190
id: 834f565d-e82e-5fa7-8b96-562125368e49
status: experimental
author: Vorant
```

### Web Server Process Spawning Command Shell (Possible Webshell Execution)

ATT&CK: T1190

Detects a web server or PHP interpreter process spawning a command shell or scripting engine, a common post-exploitation pattern after uploading and executing a PHP webshell via an RCE vulnerability like CVE-2025-67684. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.

```yaml
title: Web Server Process Spawning Command Shell
logsource:
  category: process_creation
  product: windows
detection:
  selection_parent:
    ParentImage|endswith:
    - \httpd.exe
    - \php-cgi.exe
    - \php-fpm.exe
    - \w3wp.exe
    - \nginx.exe
  selection_child:
    Image|endswith:
    - \cmd.exe
    - \powershell.exe
    - \pwsh.exe
    - \bash.exe
    - \wscript.exe
    - \cscript.exe
  condition: selection_parent and selection_child
falsepositives:
- Legitimate web application administration scripts invoking system utilities
- Scheduled maintenance tasks triggered through a web management interface
level: high
tags:
- attack.t1190
- attack.t1505.003
id: fcf1a389-fc76-50e7-a05a-bd05721ede81
status: experimental
author: Vorant
```

Behavioural rules are generated from public reporting — validate in your environment before deploying.

Source reporting: https://cert.pl/en/posts/2026/01/CVE-2025-67683

---

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