CVE-2022-50684 in Xperience
Summary
by MITRE • 12/18/2025
An HTML injection vulnerability in Kentico Xperience allows attackers to inject malicious HTML values into form submission emails via unencoded form fields. Unencoded form values could enable HTML content execution in recipient email clients, potentially compromising email security.
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Analysis
by VulDB Data Team • 12/28/2025
The vulnerability identified as CVE-2022-50684 represents a critical HTML injection flaw within Kentico Xperience, a widely used content management and digital marketing platform. This vulnerability specifically affects the form submission functionality where user-provided data is transmitted via email notifications to administrators or designated recipients. The flaw stems from insufficient input validation and output encoding mechanisms within the platform's form processing pipeline, creating an avenue for malicious actors to exploit the system's trust in user input.
The technical implementation of this vulnerability involves the absence of proper HTML encoding when form data is rendered in email templates. When users submit forms containing malicious HTML content, the platform fails to sanitize or encode these inputs before incorporating them into email messages. This oversight creates a condition where email clients receiving these messages may execute embedded HTML content, potentially including JavaScript payloads, embedded images, or other malicious constructs that could compromise user security. The vulnerability manifests when form fields contain HTML tags, script elements, or other potentially dangerous content that gets directly embedded into the email body without proper sanitization.
The operational impact of CVE-2022-50684 extends beyond simple data integrity concerns, creating significant risks for organizations relying on Kentico Xperience for customer data collection and business communications. Attackers could exploit this vulnerability to conduct phishing campaigns by embedding malicious links or scripts within form submission emails, potentially leading to credential theft, malware distribution, or further network infiltration. The attack surface is particularly concerning given that form submissions often contain sensitive user information, making these emails prime targets for social engineering attacks. Additionally, the vulnerability could be leveraged to manipulate email content, potentially damaging brand reputation through unauthorized content injection or to conduct cross-site scripting attacks against email recipients who may not be aware of the malicious content.
Organizations utilizing Kentico Xperience should implement immediate mitigations including input validation at multiple layers, comprehensive HTML sanitization of form data, and proper output encoding before email generation. The platform's developers should enforce strict content filtering mechanisms that strip or encode HTML characters from user inputs, particularly in fields that will be rendered in email contexts. Security measures should align with CWE-79 standards for HTML injection prevention, implementing proper encoding strategies such as HTML entity encoding for special characters and utilizing content security policies to limit the execution of embedded scripts. Organizations should also consider implementing email security solutions that can detect and filter potentially malicious content in form submission emails, while monitoring for unusual patterns in form submissions that might indicate exploitation attempts. This vulnerability underscores the importance of defense-in-depth strategies and proper input/output handling practices as outlined in the ATT&CK framework's techniques for command and control through email-based attacks.