CVE-2026-116847 in Mang Board Plugin
Summary
by MITRE • 10/30/2026
Unauthenticated Cross Site Scripting (XSS) in Mang Board WP <= 2.4.6 versions.
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Analysis
by VulDB Data Team • 10/30/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within Mang Board WordPress plugin versions prior to or equal to 2.4.6 represents a critical security deficiency that allows attackers to inject malicious client-side scripts into web pages viewed by other users. This specific type of Cross-Site Scripting is classified under the Common Weakness Enumeration standard as CWE-79, which denotes Improper Neutralization of Input During Web Page Generation. The unauthenticated nature of this vulnerability significantly escalates its severity because it does not require any form of user authentication or privilege escalation to exploit. An attacker can initiate an attack simply by crafting a malicious URL or payload that targets the vulnerable input parameters within the plugin's interface, making it accessible to any internet user who encounters the crafted link or script injection point.
From a technical perspective, the root cause lies in the insufficient validation and sanitization of user-supplied data before it is rendered back into the browser environment without proper encoding. When the Mang Board plugin processes input fields such as forum posts, comments, or configuration settings, it fails to adequately escape special characters that have semantic meaning in HTML and JavaScript contexts. This oversight allows an attacker to break out of the intended context of the web page's Document Object Model and inject executable script tags. The browser interprets these injected scripts as legitimate content belonging to the domain hosting the WordPress site, thereby granting the malicious code full access to the cookies, session tokens, and local storage associated with that origin due to same-origin policy constraints.
The operational impact of this vulnerability is substantial, particularly in community-driven platforms where user interaction is central. Successful exploitation enables an attacker to perform a variety of malicious actions on behalf of authenticated victims who visit the compromised page. These actions include stealing session cookies to hijack administrative or regular user accounts, redirecting users to phishing sites designed to harvest credentials, defacing the website's appearance by altering DOM elements, and logging keystrokes entered into forms within the application. In a WordPress ecosystem where plugins often have broad access to site data, this can lead to complete compromise of the underlying server if combined with other vulnerabilities or if administrative privileges are stolen via session hijacking.
In terms of threat modeling and adversary behavior, this vulnerability aligns closely with techniques described in the MITRE ATT&CK framework, specifically under the Tactic Execution category and tactics such as Collection and Credential Access. The specific technique often maps to TA0005 Defense Evasion or TA0006 Credential Access depending on whether the script is used for persistence through stored XSS or immediate credential theft via phishing redirections. Attackers frequently leverage these flaws in conjunction with social engineering campaigns, distributing malicious links through email or forums to maximize the likelihood of victim interaction and subsequent exploitation.
Mitigation strategies must prioritize both immediate remediation and long-term security hygiene. The most effective solution is to upgrade the Mang Board plugin to a version greater than 2.4.6 where these input validation issues have been addressed by the developers. If an update is not immediately available, administrators should implement Web Application Firewall rules that detect and block common XSS payloads targeting the specific endpoints affected by this vulnerability. Additionally, enforcing Content Security Policy headers can significantly reduce the impact of successful injections by restricting the sources from which scripts are allowed to execute. Regular security audits and code reviews focusing on input sanitization practices are essential for preventing similar vulnerabilities in future plugin updates or custom developments within the WordPress environment.