CVE-2026-94176 in Mang Board Plugin
Summary
by MITRE • 09/23/2026
Unauthenticated Cross Site Scripting (XSS) in Mang Board WP <= 2.4.1 versions.
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Analysis
by VulDB Data Team • 09/23/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within the Mang Board WordPress plugin, specifically affecting versions up to and including 2.4.1, represents a significant security risk due to its lack of authentication requirements. This characteristic allows any remote attacker with network access to the target web application to exploit the weakness without needing valid credentials or prior interaction with an authenticated user session. The core technical flaw stems from insufficient input validation and sanitization mechanisms within the plugin's handling of user-supplied data, likely in parameters processed by AJAX endpoints or form submissions that are accessible publicly. When malicious script payloads are injected into these inputs, they are reflected back to the victim's browser without proper encoding, leading to the execution of arbitrary JavaScript code in the context of the vulnerable website.
From a technical perspective, this vulnerability aligns with CWE-79, which categorizes improper neutralization of input during web page generation as Cross-site Scripting. The absence of authentication lowers the barrier for exploitation significantly compared to authenticated XSS vulnerabilities, enabling widespread automated attacks and increasing the likelihood of successful compromise. Attackers can leverage this flaw to execute a variety of malicious actions on behalf of unsuspecting users who visit the compromised pages or interact with injected links. These actions may include stealing session cookies, hijacking user sessions, performing unauthorized administrative actions if the victim has elevated privileges, defacing the website content, or redirecting users to phishing sites designed to harvest sensitive information such as login credentials or financial data.
The operational impact of this vulnerability extends beyond immediate script execution to potential long-term security degradation of the WordPress environment. Since Mang Board is a community forum plugin, it often handles user-generated content and interactions that are central to site engagement. An unauthenticated XSS attack can undermine trust in the platform's integrity, leading to reputational damage for the website owner or administrator. Furthermore, if combined with other vulnerabilities such as cross-site request forgery weaknesses, an attacker could escalate privileges by tricking authenticated administrators into performing unintended actions while their session is active and compromised through the injected script. This creates a chain of exploitation that can lead to full site takeover, data exfiltration, or installation of persistent backdoors for future access.
Mitigation strategies must focus on immediate remediation and defensive hardening. The primary solution is to upgrade the Mang Board plugin to version 2.4.2 or later, where the developers have presumably implemented proper input sanitization and output encoding techniques to neutralize malicious scripts before they reach the browser. Administrators should also ensure that all other WordPress core files, themes, and plugins are updated to their latest stable versions to prevent similar vulnerabilities from being exploited through different vectors. Implementing a Web Application Firewall can provide an additional layer of defense by filtering out known attack patterns associated with XSS attempts, although this should not replace patching the underlying code vulnerability. Regular security audits and penetration testing are recommended to identify any residual risks or misconfigurations that could expose similar weaknesses in other parts of the application infrastructure.
In terms of industry classification frameworks, this incident maps directly to MITRE ATT&CK technique T1059, specifically sub-technique 007 for JavaScript execution within web applications. The unauthenticated nature of the exploit places it firmly in the initial access or impact phases depending on whether the goal is reconnaissance or direct compromise. Security teams should monitor logs for unusual spikes in HTTP requests containing script tags or encoded payloads to detect potential exploitation attempts in real-time. By addressing this vulnerability promptly and adopting a proactive security posture, organizations can maintain the confidentiality, integrity, and availability of their web applications while protecting user data from unauthorized access and manipulation.