CVE-2026-113465 in Network Security
Summary
by MITRE • 10/20/2026
It is possible to execute a DOM-based Cross-Site Scripting attack against Stormshield’s web administration panel.
To exploit this vulnerability, an attacker would need to craft a URL containing a malicious script payload within a specific parameter and lure an authenticated administrator into visiting that link.
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Analysis
by VulDB Data Team • 10/20/2026
The identified vulnerability represents a significant security risk within the web-based administrative interface of Stormshield network protection appliances. This flaw is classified as a DOM-based Cross-Site Scripting (XSS) issue, which differs from traditional reflected or stored XSS attacks in its mechanism of execution. In this specific context, the malicious script payload does not necessarily need to be processed by the server-side application logic before being returned to the client. Instead, the vulnerability resides within the client-side JavaScript code that processes data extracted directly from the URL fragment or query parameters and writes it into the Document Object Model without adequate sanitization. This architectural characteristic allows an attacker to inject executable content that runs in the context of the victim's browser session, effectively bypassing server-side input validation controls that are typically employed to mitigate standard XSS vectors.
The operational impact of this vulnerability is severe due to its potential for privilege escalation and data exfiltration within a network security management environment. Since exploitation requires an authenticated administrator to visit a crafted URL, the attack relies on social engineering tactics such as phishing or link manipulation in trusted communication channels. Once executed, the malicious script operates with the same privileges as the logged-in administrator. This enables attackers to perform unauthorized actions including modifying firewall rules, disabling logging mechanisms, creating backdoor accounts, or exfiltrating sensitive network configuration data and credentials stored within the session cookies or local storage of the administration panel. The ability to manipulate the DOM allows for keylogging, credential harvesting from form fields, or even redirecting the administrator to a malicious site that mimics the legitimate interface to steal further authentication details.
From a classification perspective, this vulnerability aligns with CWE-79, which covers Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. Specifically, it falls under DOM-based XSS where the sink is located in client-side code rather than server-generated HTML. In terms of offensive security frameworks such as MITRE ATT&CK, this technique maps to T1059 Command and Control via Browser Relay or potentially T1204 User Execution if considered part of a broader phishing campaign leading to initial access. The reliance on user interaction classifies it under techniques that exploit human trust rather than purely automated system flaws, making detection through standard network monitoring tools difficult without behavioral analysis or strict Content Security Policy implementations.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Administrators should apply the latest security patches provided by Stormshield to address this specific flaw in the web administration panel codebase. From a defensive posture perspective, implementing a robust Content Security Policy is critical; specifically, restricting script execution sources can prevent unauthorized scripts from running even if they are injected into the DOM. Additionally, developers must ensure that all data derived from URL parameters or other client-side inputs undergoes rigorous encoding before being written to the document structure using methods like innerHTML. Input validation should be enforced on both the client and server sides to create a defense-in-depth strategy. Security awareness training for administrators is also essential to recognize suspicious URLs, as technical controls alone may not prevent all social engineering attempts targeting privileged accounts.