CVE-2018-7280 in Ninja Forms Plugin
Summary
by MITRE
The Ninja Forms plugin before 3.2.14 for WordPress has XSS.
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Analysis
by VulDB Data Team • 01/07/2020
The vulnerability identified as CVE-2018-7280 represents a cross-site scripting flaw within the Ninja Forms WordPress plugin, affecting versions prior to 3.2.14. This security weakness resides in the plugin's handling of user input within form processing and display functionalities, creating an avenue for malicious actors to inject arbitrary JavaScript code into web pages viewed by other users. The vulnerability specifically impacts WordPress environments where Ninja Forms is installed and actively used for creating and managing web forms, making it a significant concern for website administrators and security professionals managing content management systems.
The technical implementation of this XSS vulnerability stems from insufficient input sanitization and output escaping within the plugin's core codebase. When users submit data through Ninja Forms, the plugin fails to properly validate and escape special characters in form fields before rendering them in HTML output contexts. This allows attackers to craft malicious payloads that can execute within the browser context of authenticated users, particularly those with administrative privileges or who interact with form data. The vulnerability manifests when the plugin processes form submissions containing crafted script tags or other malicious content that bypasses standard security filters and gets executed in the victim's browser. This flaw operates under the Common Weakness Enumeration category CWE-79, which specifically addresses cross-site scripting vulnerabilities where applications fail to properly escape output data.
The operational impact of CVE-2018-7280 extends beyond simple data theft or defacement, as it can enable attackers to escalate privileges and gain unauthorized access to WordPress administrative functions. An attacker could potentially steal session cookies, redirect users to malicious sites, or inject persistent malicious code that affects all users interacting with compromised forms. The vulnerability is particularly dangerous in environments where administrators frequently interact with form data or where users submit sensitive information through Ninja Forms, as it could lead to complete system compromise. Attackers might leverage this vulnerability to establish persistent backdoors, modify form configurations, or extract sensitive data from form submissions that contain personal or business information, making it a critical concern for organizations relying on WordPress for business operations.
Mitigation strategies for this vulnerability require immediate patching of the Ninja Forms plugin to version 3.2.14 or later, which contains the necessary code modifications to properly sanitize and escape user input. System administrators should also implement additional security measures including input validation at multiple layers, content security policy implementation, and regular security auditing of WordPress plugins and themes. The remediation process should involve thorough testing of the updated plugin to ensure no functionality is broken while verifying that the XSS vulnerability has been fully addressed. Organizations should consider implementing web application firewalls and monitoring for suspicious form submission patterns as additional defensive measures, aligning with ATT&CK framework techniques related to credential access and persistence through web application vulnerabilities. Regular security assessments and patch management processes should be strengthened to prevent similar vulnerabilities from being introduced through third-party components in WordPress environments.