CVE-2026-125447 in Kali Forms Plugin
Summary
by MITRE • 11/15/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kaliforms Kali Forms kali-forms allows Reflected XSS.This issue affects Kali Forms: from n/a through 2.4.31.
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Analysis
by VulDB Data Team • 11/15/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests as a Reflected XSS within the Kali Forms plugin for WordPress, affecting versions ranging from initial releases up through version 2.4.31. In a reflected attack scenario, malicious script payloads are embedded directly into HTTP requests and immediately returned by the web application in an error message, search result, or other response without proper sanitization. This mechanism allows attackers to craft deceptive links that, when clicked by a victim, execute arbitrary JavaScript code within the context of the vulnerable website's domain.
From a technical perspective, the root cause lies in the insufficient validation and encoding of user-supplied input before it is rendered back into the HTML output stream. When Kali Forms processes form submissions or query parameters related to its functionality, it fails to adequately strip out special characters such as angle brackets, quotes, and ampersands that are essential for constructing malicious script tags. Consequently, if an attacker injects a payload like <script>alert(document.cookie)</script> into a parameter that is reflected in the page response, the browser interprets this input not merely as text but as executable code. This breakdown in data handling violates fundamental web security principles regarding the separation of content and code, allowing client-side scripts to run with the privileges associated with the trusted website.
The operational impact of this vulnerability extends beyond simple script execution. Because the malicious code runs within the same origin policy context as the legitimate application, it can access sensitive user data stored in cookies, local storage, or session tokens. An attacker could leverage this capability to hijack administrative sessions, steal credentials, perform actions on behalf of authenticated users such as submitting fraudulent forms or modifying settings, and even redirect victims to phishing sites designed to harvest additional personal information. This compromises the confidentiality, integrity, and availability aspects of the web application's security posture, potentially leading to significant data breaches and reputational damage for site administrators relying on Kali Forms for their contact or registration processes.
In terms of industry classification standards, this vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). Furthermore, the exploitation technique maps directly to MITRE ATT&CK tactic TA0001 Initial Access and specifically the Tactic T1189 Drive-by Client-Side Code Execution or more precisely within web application contexts, it relates to techniques involving client-side injection. The reflected nature of this XSS means that social engineering is often required to deliver the payload via phishing emails or malicious links, making user awareness a critical component in mitigating immediate risks while technical fixes are deployed.
To mitigate this vulnerability, administrators must upgrade Kali Forms to version 2.4.32 or any subsequent release where the developers have implemented robust input validation and output encoding mechanisms. It is imperative that all user inputs undergo strict server-side sanitization using whitelisting approaches rather than blacklisting dangerous characters. Additionally, implementing Content Security Policy headers can provide an additional layer of defense by restricting the sources from which scripts are allowed to execute, thereby neutralizing many XSS attacks even if they bypass input filters. Regular security audits and penetration testing should be conducted on WordPress plugins to ensure that such injection points do not exist in other components of the web stack.