CVE-2026-125443 in WPJAM Basic Plugin
Summary
by MITRE • 11/15/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Denishua WPJAM Basic wpjam-basic allows DOM-Based XSS.This issue affects WPJAM Basic: from n/a through 7.1.2.
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Analysis
by VulDB Data Team • 11/15/2026
The identified security flaw represents a classic instance of Cross-Site Scripting, specifically categorized under the Common Weakness Enumeration identifier CWE-80 for Improper Neutralization of Input During Web Page Generation. This vulnerability is present in the WPJAM Basic plugin for WordPress, affecting versions ranging from its initial release through version 7.1.2. The core technical deficiency lies in the application's failure to properly sanitize or encode user-supplied input before it is rendered within a web page context. Unlike server-side XSS where malicious scripts are stored and served later, this specific implementation manifests as DOM-Based Cross-Site Scripting. In this scenario, the vulnerability originates from client-side JavaScript code that reads data from an unusual source such as the URL fragment or form inputs and writes it to the Document Object Model without adequate validation. This allows an attacker to inject malicious scripts directly into the browser environment of a victim user who interacts with a specially crafted link or input field within the affected plugin interface.
From an operational perspective, this vulnerability poses significant risks to both end-users and site administrators. An attacker can exploit this flaw by crafting a malicious URL that includes script payloads in query parameters or hash fragments. When a legitimate user visits this manipulated page while logged into the WordPress dashboard using WPJAM Basic, their browser executes the injected JavaScript code within the context of the trusted domain. This execution grants the attacker the ability to perform actions on behalf of the victim, such as stealing session cookies, capturing authentication tokens, or performing administrative actions like creating new users or modifying site settings if the victim has elevated privileges. The impact is particularly severe in WordPress environments because compromising an administrator account can lead to full control over the website, including defacement, data exfiltration, and using the server for further attacks against other entities on the network.
The attack vector aligns with several techniques documented in the MITRE ATT&CK framework. Specifically, this vulnerability facilitates Initial Access through phishing or lure-based tactics where a victim is tricked into visiting a malicious link, which corresponds to T1566 Phishing. Once inside, the execution of arbitrary code maps directly to Technique T1059 Command and Scripting Interpreter, as the injected script acts as an interpreter for further commands. Furthermore, if the attacker uses this access to steal credentials or tokens, it relates to T1539 Steal Web Session Cookie. The lack of input validation also reflects a broader failure in secure coding practices often associated with CWE-20 Improper Input Validation and CWE-749 Exposed Dangerous Method, as the plugin exposes functionality that processes untrusted data without sufficient safeguards.
To mitigate this vulnerability, immediate action is required to update the WPJAM Basic plugin to version 7.1.3 or later, where these input handling issues have been addressed by developers through proper encoding and validation mechanisms. For organizations unable to patch immediately due to compatibility constraints, implementing a Web Application Firewall can provide an additional layer of defense by filtering out known malicious patterns in HTTP requests before they reach the application logic. Additionally, enforcing strict Content Security Policy headers on the WordPress site can significantly reduce the impact of any successful XSS attempt by restricting the sources from which scripts are allowed to execute. Regular security audits and code reviews focusing on how user input is processed and rendered within DOM elements are essential preventive measures against such client-side vulnerabilities in future development cycles.