CVE-2025-13649 Overview
CVE-2025-13649 is a Cross-Site Scripting (XSS) vulnerability in the ZeusWeb application developed by Microcom. The vulnerability exists in the password recovery functionality and allows attackers to inject arbitrary JavaScript code through the Email parameter. This reflected XSS vulnerability can be exploited without authentication, as the attack targets the "Recover password" section of the application which is publicly accessible.
Critical Impact
Attackers can execute arbitrary JavaScript in the context of victim browsers, potentially leading to session hijacking, credential theft, or malicious redirects targeting ZeusWeb users.
Affected Products
- Microcom ZeusWeb version 6.1.31
Discovery Timeline
- 2026-02-11 - CVE-2025-13649 published to NVD
- 2026-02-11 - Last updated in NVD database
Technical Details for CVE-2025-13649
Vulnerability Analysis
This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The ZeusWeb application fails to properly sanitize user-supplied input in the Email parameter within the password recovery functionality. When a user submits a malicious payload through this parameter, the application reflects the input back to the page without proper encoding or validation, allowing the injected JavaScript to execute in the victim's browser context.
The attack can be performed remotely over the network and requires some user interaction, such as clicking a malicious link. No prior authentication is required to access the vulnerable endpoint, as the password recovery feature is designed to be publicly accessible.
Root Cause
The root cause of this vulnerability is insufficient input validation and output encoding in the ZeusWeb password recovery functionality. The application directly incorporates user-supplied data from the Email parameter into the HTML response without proper sanitization. This allows attackers to break out of the expected data context and inject executable script content.
Attack Vector
The attack is network-based and targets the password recovery page located at the ZeusWeb application endpoint. An attacker crafts a malicious URL containing JavaScript code in the Email parameter and tricks a victim into clicking the link. When the victim visits the crafted URL, the malicious JavaScript executes in their browser with the privileges of the ZeusWeb application.
The vulnerability can be exploited through crafted URLs sent via phishing emails, malicious advertisements, or social engineering attacks. Once executed, the injected script can perform actions such as stealing session cookies, capturing keystrokes, redirecting users to malicious sites, or performing actions on behalf of the authenticated user.
Detection Methods for CVE-2025-13649
Indicators of Compromise
- Unusual HTTP requests to the ZeusWeb password recovery endpoint containing script tags or JavaScript event handlers in the Email parameter
- Web server logs showing encoded characters such as %3Cscript%3E or javascript: in URL parameters targeting the recovery page
- User reports of unexpected browser behavior or pop-ups when interacting with ZeusWeb
Detection Strategies
- Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in request parameters
- Monitor web server access logs for requests containing HTML tags, script elements, or event handlers in the Email parameter
- Deploy browser-based XSS protection headers and Content Security Policy (CSP) to limit script execution
Monitoring Recommendations
- Enable detailed logging for all requests to the password recovery functionality
- Configure security monitoring tools to alert on suspicious patterns in URL parameters
- Review client-side error reports for JavaScript execution anomalies
How to Mitigate CVE-2025-13649
Immediate Actions Required
- Update ZeusWeb to a patched version when available from Microcom
- Implement input validation on the Email parameter to accept only valid email address formats
- Apply output encoding to all user-supplied data before rendering in HTML responses
- Deploy Content Security Policy (CSP) headers to restrict inline script execution
Patch Information
No vendor patch information is currently available in the CVE data. Organizations should monitor the Microcom Zeus Web Service for security updates. For additional technical details, refer to the HackRTU Blog Post on CVE-2025-13649.
Workarounds
- Implement a Web Application Firewall (WAF) with XSS detection rules to filter malicious requests targeting the password recovery endpoint
- Restrict access to the ZeusWeb application to trusted IP ranges where feasible
- Educate users about the risks of clicking suspicious links, particularly those related to password recovery
# Example CSP header configuration for Apache
# Add to .htaccess or server configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none';"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
