CVE-2025-22499 in F4 Post Tree Plugin
Summary
by MITRE • 01/13/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in FAKTOR VIER F4 Post Tree allows Reflected XSS.This issue affects F4 Post Tree: from n/a through 1.1.18.
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Analysis
by VulDB Data Team • 02/13/2025
The vulnerability identified as CVE-2025-22499 represents a critical cross-site scripting weakness within the FAKTOR VIER F4 Post Tree plugin, specifically manifesting as improper neutralization of input during web page generation. This flaw enables attackers to inject malicious scripts into web pages viewed by other users, creating a persistent security risk that can be exploited through various attack vectors. The vulnerability is classified under CWE-79 which specifically addresses cross-site scripting flaws in web applications, making it a well-documented and severe category of web security vulnerabilities.
The technical implementation of this reflected cross-site scripting vulnerability occurs when the F4 Post Tree plugin fails to properly sanitize or encode user-supplied input before incorporating it into dynamically generated web content. When malicious input is processed through the plugin's web page generation mechanism, the unescaped data can be interpreted by web browsers as executable script code rather than plain text. This allows attackers to inject malicious JavaScript code that executes in the context of other users' browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of victims. The vulnerability affects all versions of the plugin from the initial release through version 1.1.18, indicating a long-standing issue that has not been adequately addressed.
The operational impact of this vulnerability extends beyond simple script injection, as it creates a persistent threat vector that can be exploited by attackers to compromise user sessions and potentially gain unauthorized access to sensitive data. Reflected XSS attacks are particularly dangerous because they can be delivered through various means including malicious links sent via email, social engineering campaigns, or compromised websites that redirect users to exploit the vulnerability. The attack surface is broad since the vulnerability affects the core functionality of the plugin, which is likely used across multiple web applications and platforms. Users who interact with content managed by the F4 Post Tree plugin become potential victims, as their browsers will execute the malicious scripts without proper sanitization of the input data.
Mitigation strategies for CVE-2025-22499 should focus on immediate remediation through plugin updates to versions that properly address the input sanitization issues. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent malicious data from being executed as scripts. The principle of least privilege should be applied to restrict the execution of any user-supplied content, while implementing Content Security Policy headers to further limit script execution capabilities. Additionally, regular security assessments should be conducted to identify similar vulnerabilities in other web applications and plugins, as reflected XSS issues often indicate broader security weaknesses in web application design. The vulnerability's classification under the ATT&CK framework as a web application vulnerability underscores the need for comprehensive security controls including web application firewalls, regular security testing, and user education about suspicious links and content.