CVE-2026-84770 in Mang Board Plugin
Summary
by MITRE • 09/02/2026
Unauthenticated Cross Site Request Forgery (CSRF) in Mang Board WP <= 2.3.8 versions.
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Analysis
by VulDB Data Team • 09/02/2026
The vulnerability identified as an unauthenticated Cross-Site Request Forgery within Mang Board WordPress plugin versions up to and including 2.3.8 represents a critical security flaw that undermines the integrity of administrative actions through deceptive requests. This type of attack exploits the trust that a web application has in a user's browser, specifically targeting state-changing operations such as modifying settings, creating users, or altering content without requiring any form of authentication token validation on the server side for these specific endpoints. The absence of anti-CSRF tokens allows an attacker to craft malicious HTML pages or scripts that automatically submit requests to the vulnerable application when visited by a logged-in administrator who has previously authenticated with the WordPress site.
From a technical perspective, the core issue lies in the lack of synchronization between client-side state and server-side request validation for critical administrative functions. When a user logs into the WordPress dashboard, their session is established via cookies or other authentication mechanisms maintained by the browser. The vulnerable endpoints within Mang Board fail to verify that incoming requests originate from legitimate pages served by the application itself rather than external malicious sources. This omission means that any HTTP POST request containing valid credentials in the cookie header will be processed as if it were initiated by the user, regardless of its actual origin. Attackers can leverage this weakness by hosting a webpage designed to trigger these specific API calls or form submissions automatically upon loading, effectively hijacking the administrator's active session to perform unauthorized actions.
The operational impact of this vulnerability is severe because it enables remote code execution scenarios indirectly through privilege escalation and data manipulation. An attacker does not need valid credentials for the target site; they only require a victim with administrative privileges to visit a malicious link or load a compromised webpage while their browser retains an active session on the WordPress installation. Once executed, the forged requests can lead to significant consequences such as defacement of the website, injection of backdoors via plugin modifications, exfiltration of sensitive data stored in the database, or complete takeover of the server if combined with other vulnerabilities like arbitrary file uploads often found in poorly secured plugins. The unauthenticated nature of this CSRF means that no prior interaction beyond visiting a malicious site is needed to initiate the attack chain, making it highly effective for drive-by attacks and social engineering campaigns targeting system administrators.
In terms of industry classification standards, this vulnerability aligns with CWE-352, which defines Cross-Site Request Forgery as an issue where unauthorized commands are transmitted from a user that the web application trusts. Furthermore, within the MITRE ATT&CK framework, this behavior corresponds to techniques under Tactic TA0001 Initial Access and specifically relates to methods used for privilege escalation or persistence through automated script execution on client systems. The lack of proper request validation places the organization at risk according to OWASP Top 10 guidelines regarding Broken Access Control and Security Misconfiguration, highlighting a failure in implementing robust security controls against state-changing operations.
To mitigate this vulnerability, immediate remediation is required by updating the Mang Board plugin to version 2.3.9 or later where these issues have been addressed. Developers must implement anti-CSRF tokens for all administrative endpoints that modify server state. These tokens should be unique per session and validated on every request before processing any changes. Additionally, implementing the SameSite cookie attribute with a value of Strict or Lax can prevent browsers from sending cookies in cross-site requests, providing an additional layer of defense against CSRF attacks even if token validation is imperfect. Organizations should also enforce regular security audits and vulnerability scanning to detect similar misconfigurations across their WordPress ecosystem before they can be exploited by malicious actors seeking unauthorized access.