CVE-2025-6575: Dolusoft Omaspot XSS Vulnerability

CVE-2025-6575 Overview

CVE-2025-6575 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Dolusoft Omaspot versions before 12.09.2025. The flaw stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. Attackers can craft malicious URLs that, when visited by an authenticated or unauthenticated victim, execute arbitrary JavaScript in the victim's browser session. The vulnerability is network-exploitable and requires user interaction, such as clicking a crafted link. Successful exploitation results in session hijacking, credential theft, or unauthorized actions performed within the context of the targeted web application.

Critical Impact
Attackers can execute arbitrary JavaScript in a victim's browser, enabling session theft, phishing overlays, and account takeover through crafted links.

Affected Products

Dolusoft Omaspot versions prior to 12.09.2025
Web-facing deployments of Omaspot accessible over the network
Any Omaspot instance where users can be lured into clicking crafted URLs

Discovery Timeline

2025-09-16 - CVE-2025-6575 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-6575

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in Dolusoft Omaspot. The application accepts input through HTTP request parameters and reflects that input back into HTML responses without proper encoding or sanitization. This allows an attacker to inject arbitrary HTML and JavaScript that executes in the victim's browser under the origin of the vulnerable Omaspot instance.

Reflected XSS payloads are typically embedded in URL query strings or form parameters. When a victim follows a crafted link, the malicious payload is echoed back within the server response and rendered by the browser. Because execution occurs in the trusted application context, the payload can access cookies, session tokens, and DOM content available to the current user.

The scope-changed rating in the CVSS vector indicates that the impact extends beyond the vulnerable component to affect other resources such as the user's browser session and other same-origin content.

Root Cause

The root cause is missing output encoding on user-controlled input placed into HTML responses. Omaspot fails to apply context-aware escaping when reflecting request parameters, allowing script tags and event handlers to be interpreted by the browser rather than treated as literal text.

Attack Vector

An attacker crafts a URL containing a JavaScript payload in a vulnerable parameter and delivers it through phishing, social media, or malvertising. When the victim clicks the link, the Omaspot server reflects the payload into the response HTML. The browser then executes the injected script, granting the attacker access to session cookies, form data, and application functionality available to the victim.

The vulnerability mechanism is described in the USOM Notification TR-25-0254 and the Siber Güvenlik Notification. No public proof-of-concept exploit code is currently available.

Detection Methods for CVE-2025-6575

Indicators of Compromise

HTTP request logs containing <script>, onerror=, onload=, or javascript: sequences within query string parameters
Unexpected outbound requests from user browsers to attacker-controlled domains shortly after visiting Omaspot pages
URL-encoded payload fragments such as %3Cscript%3E or %3Cimg in Omaspot access logs
User reports of unexpected popups, redirects, or authentication prompts within Omaspot sessions

Detection Strategies

Deploy web application firewall (WAF) rules that inspect query parameters and form fields for XSS signatures targeting Omaspot endpoints
Analyze Omaspot HTTP access logs for reflected parameter values that match known XSS payload patterns
Enable Content Security Policy (CSP) violation reporting to identify script execution attempts in the browser
Correlate suspicious referrer headers with Omaspot request patterns to identify phishing-driven exploitation

Monitoring Recommendations

Forward Omaspot web server logs to a centralized logging platform for continuous inspection of URL parameters
Monitor for anomalous session activity, such as concurrent logins from disparate geolocations following link clicks
Alert on outbound browser connections from Omaspot users to newly registered or low-reputation domains
Track user-agent and referrer patterns to identify targeted phishing campaigns exploiting this vulnerability

How to Mitigate CVE-2025-6575

Immediate Actions Required

Upgrade Dolusoft Omaspot to version 12.09.2025 or later immediately
Restrict access to Omaspot administrative interfaces using network-level controls until patching is complete
Notify Omaspot users about active phishing risks and instruct them to avoid clicking untrusted links referencing the application
Rotate active session tokens and force reauthentication after applying the patch

Patch Information

Dolusoft has addressed CVE-2025-6575 in Omaspot version 12.09.2025. Administrators should consult the Siber Güvenlik Notification and the USOM Notification TR-25-0254 for vendor-provided upgrade guidance. Verify the installed version after upgrade and confirm reflected parameters are properly encoded in HTTP responses.

Workarounds

Deploy a WAF with XSS filtering rules in front of Omaspot to block malicious query parameters until the patch is applied
Enforce a strict Content Security Policy that disables inline script execution and limits script sources to trusted origins
Configure the HttpOnly and Secure flags on session cookies to reduce the impact of successful script injection
Educate users about phishing risks and validate suspicious Omaspot URLs before clicking

bash

# Configuration example: strict CSP header for reverse proxy fronting Omaspot
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'none'; base-uri 'self'";
add_header X-Content-Type-Options "nosniff";
add_header X-Frame-Options "DENY";
add_header Set-Cookie "SessionID=<value>; HttpOnly; Secure; SameSite=Strict";