CVE-2025-11960 Overview
CVE-2025-11960 is a reflected Cross-Site Scripting (XSS) vulnerability in KVKNET, a product developed by Aryom Software High Technology Systems Inc. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft malicious URLs that execute arbitrary JavaScript in a victim's browser when the link is clicked. The vulnerability affects KVKNET versions prior to 2.1.8 and was published to the National Vulnerability Database (NVD) on November 11, 2025.
Critical Impact
Successful exploitation allows attackers to execute script in the victim's browser context, enabling session theft, credential harvesting, and unauthorized actions within the KVKNET application.
Affected Products
- Aryom Software High Technology Systems Inc. KVKNET (all versions before 2.1.8)
Discovery Timeline
- 2025-11-11 - CVE-2025-11960 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-11960
Vulnerability Analysis
CVE-2025-11960 is a reflected XSS issue in the KVKNET web application. The application accepts user-supplied input through HTTP request parameters and reflects that input back into the rendered HTML response without adequate encoding or sanitization. When a victim follows a crafted link, the injected payload executes in the browser under the origin of the KVKNET application.
The scope change component of the CVSS vector indicates that a successful attack can affect resources beyond the vulnerable component, including cookies and tokens scoped to the parent origin. User interaction is required, so exploitation typically involves phishing or link injection on trusted platforms.
The Exploit Prediction Scoring System (EPSS) data (as of 2026-07-20) indicates a low near-term probability of active exploitation, but reflected XSS remains a common initial vector for credential theft and session hijacking against authenticated portal users.
Root Cause
The root cause is the failure to neutralize special characters in user-controlled input before including it in HTTP response bodies. Output encoding routines for HTML, attribute, and JavaScript contexts are either missing or applied inconsistently within the KVKNET request handlers.
Attack Vector
An attacker crafts a URL containing a malicious script payload targeting a vulnerable KVKNET endpoint. The attacker distributes the URL through phishing email, chat, or a compromised website. When an authenticated user clicks the link, the browser renders the reflected payload and executes attacker-controlled JavaScript. The script can exfiltrate session cookies, submit forged requests, or modify page content to harvest credentials.
No verified public proof-of-concept is available. For technical details, refer to the USOM Security Advisory and the Siber Güvenlik Advisory.
Detection Methods for CVE-2025-11960
Indicators of Compromise
- HTTP request logs containing script tags, event handlers (onerror, onload), or javascript: URIs in query string or form parameters targeting KVKNET endpoints.
- Referrer headers pointing to unfamiliar external domains preceding authenticated KVKNET sessions.
- Anomalous outbound requests from user browsers to attacker-controlled hosts following KVKNET page loads.
Detection Strategies
- Deploy a Web Application Firewall (WAF) rule set that inspects query and form parameters for HTML tag characters, JavaScript keywords, and URL-encoded script fragments.
- Enable server-side request logging on all KVKNET application endpoints and retain full URLs including query strings for analysis.
- Correlate authentication events with request logs to identify session hijacking following suspicious inbound URLs.
Monitoring Recommendations
- Monitor for repeated requests from a single source containing encoded payloads such as %3Cscript%3E, %3Cimg, or javascript%3A.
- Track outbound DNS and HTTP traffic from workstations that interact with KVKNET to detect data exfiltration.
- Alert on Content Security Policy (CSP) violation reports if CSP headers are configured on the application.
How to Mitigate CVE-2025-11960
Immediate Actions Required
- Upgrade KVKNET to version 2.1.8 or later on all deployments.
- Notify users of the phishing risk and instruct them not to follow unsolicited KVKNET links.
- Invalidate active sessions after patching to eliminate any tokens that may have been captured.
Patch Information
Aryom Software High Technology Systems Inc. has addressed this vulnerability in KVKNET version 2.1.8. Administrators should apply the update following the vendor's standard upgrade process. Refer to the USOM Security Advisory for the official bulletin.
Workarounds
- Deploy WAF rules that block requests containing HTML or JavaScript metacharacters in parameters processed by KVKNET.
- Configure a strict Content-Security-Policy response header that disallows inline scripts and restricts script sources to trusted origins.
- Set the HttpOnly and Secure flags on session cookies to reduce the impact of script execution in the browser.
# Example CSP header to limit reflected XSS impact
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; frame-ancestors 'none'
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
