CVE-2026-84815 in Enfold Plugin
Summary
by MITRE • 09/03/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kriesi Enfold allows Reflected XSS.
This issue affects Enfold: from n/a through 8.0.
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Analysis
by VulDB Data Team • 09/03/2026
The identified security flaw represents a classic instance of improper neutralization of input during web page generation, commonly categorized under the Cross-Site Scripting (XSS) vulnerability class. Specifically, this is a Reflected XSS issue within the Kriesi Enfold WordPress theme, affecting versions ranging from n/a through 8.0. This type of vulnerability occurs when an application receives data in an HTTP request and includes that unsafe data into its output without first validating or encoding it to ensure it cannot be interpreted as executable code by the browser. In this specific context, the flaw lies within how Enfold processes user-supplied input parameters passed via URL query strings or form submissions, failing to adequately sanitize these inputs before rendering them in the HTML response sent back to the client.
From a technical perspective, the vulnerability stems from insufficient output encoding and lack of strict type checking on dynamic content injection points. When an attacker crafts a malicious payload containing JavaScript code embedded within standard HTTP parameters, such as GET or POST data, the vulnerable script processes this input directly into the DOM structure without applying necessary escaping mechanisms like HTML entity encoding or context-aware filtering. Consequently, when another user visits the compromised URL, their browser parses and executes the injected script in the security context of the website hosting Enfold. This behavior aligns with CWE-79, which defines Improper Neutralization of Input During Web Page Generation as a critical weakness allowing attackers to inject client-side scripts into web pages viewed by other users.
The operational impact of this reflected XSS vulnerability is significant for both end-users and site administrators. Attackers can leverage this flaw to execute arbitrary JavaScript in the context of the victim's session, effectively bypassing same-origin policy restrictions that normally isolate content from different origins. This capability enables a range of malicious activities including session hijacking, where attackers steal authentication cookies or tokens to impersonate legitimate users; credential harvesting by displaying fake login forms via DOM manipulation; and defacement of the website interface for reputational damage. Furthermore, because reflected XSS payloads are delivered through links, they can be effectively weaponized in phishing campaigns, tricking unsuspecting visitors into clicking malicious URLs that appear to originate from a trusted domain, thereby increasing the success rate of social engineering attacks.
In terms of threat modeling and industry frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1059.007, which covers JavaScript execution within browser environments. The attack vector typically involves external input via web-based protocols such as HTTP or HTTPS, classifying it under Initial Access techniques where the attacker relies on user interaction to trigger the exploit chain. Unlike stored XSS, reflected variants require active engagement from victims but offer a lower barrier to entry for exploitation due to their simplicity and direct delivery mechanism through URLs shared via email, social media, or search engine results pages.
To mitigate this vulnerability, immediate action is required by updating the Kriesi Enfold theme to version 8.1 or later where these input sanitization issues have been addressed. Developers should implement robust output encoding strategies tailored to the specific context of data insertion, ensuring that special characters are properly escaped before being rendered in HTML attributes, script blocks, or event handlers. Additionally, adopting a Content Security Policy (CSP) can provide an additional layer of defense by restricting the sources from which scripts can be loaded and executed, thereby neutralizing many XSS payloads even if they manage to bypass input validation filters. Regular security audits and static code analysis tools focused on detecting injection flaws should also be integrated into the development lifecycle to prevent similar issues in future releases.