CVE-2025-0643 Overview
CVE-2025-0643 is a stored Cross-Site Scripting (XSS) vulnerability in Pyxis Signage, a digital signage product developed by Narkom Communication and Software Technologies Trade Ltd. Co. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Authenticated attackers with high privileges can inject persistent JavaScript payloads that execute in the browsers of other users who view the affected pages. The vulnerability affects all Pyxis Signage versions through 31012025. It was published to the National Vulnerability Database (NVD) on November 20, 2025.
Critical Impact
Successful exploitation enables persistent script execution in administrative contexts, leading to session theft, signage content tampering, and full compromise of the management interface.
Affected Products
- Narkom Pyxis Signage through version 31012025
- Pyxis Signage management web interface
- All deployments running unpatched releases
Discovery Timeline
- 2025-11-20 - CVE-2025-0643 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-0643
Vulnerability Analysis
The vulnerability is a stored XSS issue in the Pyxis Signage web application. The application accepts input from authenticated users and renders it back into HTML pages without sufficient sanitization or output encoding. The injected script payload persists in backend storage and executes each time a user loads the affected view. Because signage management platforms typically run with elevated administrative privileges, the impact extends beyond simple script execution. The Exploit Prediction Scoring System (EPSS) places this issue at 0.325% with a percentile of 24.1, indicating limited observed exploitation activity at this time.
Root Cause
The root cause is missing input neutralization in fields processed by the Pyxis Signage web interface. The application stores user input verbatim and later inserts it into generated HTML responses without contextual encoding. This violates standard output encoding practices defined under [CWE-79].
Attack Vector
An attacker must hold an authenticated session with high privileges on the Pyxis Signage instance. The attacker submits a crafted payload through an input field that is later rendered for other administrators or operators. When a victim loads the affected page, the stored payload executes in their browser session. The attacker can hijack sessions, manipulate displayed signage content, or pivot to backend administrative functions. Detailed technical context is available in the USOM Notification TR-25-0404 and Siber Güvenlik Notification TR-25-0404.
Detection Methods for CVE-2025-0643
Indicators of Compromise
- HTML tags such as <script>, <img onerror=>, or <svg onload=> stored in Pyxis Signage configuration fields, signage labels, or metadata records.
- Outbound HTTP requests from administrator browsers to unknown domains immediately after loading Pyxis Signage management pages.
- Unexpected session cookie transmissions or new administrative accounts created shortly after viewing signage records.
Detection Strategies
- Inspect database records and API responses for HTML or JavaScript syntax in fields intended to hold plain text.
- Deploy a Content Security Policy (CSP) in report-only mode to identify unauthorized inline script execution in the Pyxis Signage interface.
- Review web server access logs for POST requests containing URL-encoded angle brackets, javascript: schemes, or event handler attributes.
Monitoring Recommendations
- Forward Pyxis Signage application logs and web server logs to a centralized SIEM for correlation against XSS payload patterns.
- Alert on administrative actions performed immediately after a signage record view, which can indicate session hijacking via stored XSS.
- Track creation and modification timestamps on signage records to identify content tampering by injected scripts.
How to Mitigate CVE-2025-0643
Immediate Actions Required
- Identify all Pyxis Signage deployments and confirm whether they are running a version at or before 31012025.
- Restrict access to the management interface to trusted networks and require multi-factor authentication for privileged accounts.
- Audit existing signage records and configuration fields for embedded HTML or JavaScript and remove malicious entries.
Patch Information
No fixed version is identified in the published CVE record. Contact Narkom Communication and Software Technologies Trade Ltd. Co. directly for vendor-supplied patches or updated builds. Monitor the USOM Notification TR-25-0404 for updates regarding remediation guidance.
Workarounds
- Limit Pyxis Signage administrative access to a small set of trusted operators until a patch is available.
- Deploy a web application firewall (WAF) with rules that block common XSS payloads targeting the signage management endpoints.
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to known-good origins.
- Rotate session cookies and credentials for any account that may have viewed unsanitized signage records.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
