CVE-2026-114555 in Data Field Module
Summary
by MITRE • 10/30/2026
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Data field allows Stored XSS. This issue affects Data field versions: from 0.0.0 to 2.0.14.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/30/2026
The identified vulnerability represents a critical security flaw within the Drupal Data module, specifically classified as an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. This issue is categorized under CWE-79 in the Common Weakness Enumeration framework and maps to the T1059 technique in the MITRE ATT&CK matrix, which covers execution through browser-based scripting languages. The vulnerability exists within versions of the Data field module ranging from 0.0.0 up to version 2.0.14, indicating a long-standing exposure that has persisted across multiple iterations of the software due to insufficient sanitization mechanisms in how user-supplied data is processed and rendered.
At its core, this vulnerability stems from the failure of the application to properly validate or encode input fields before they are included in dynamic web page content. When an attacker submits malicious script code through a Data field entry, the system accepts this input without applying necessary neutralization techniques such as HTML entity encoding or context-aware output escaping. Consequently, when other users view the affected content, their browsers interpret the injected scripts as legitimate executable commands rather than static text data. This lack of proper sanitization allows the malicious payload to execute within the security context of the victim's browser session, bypassing standard same-origin policies that are designed to prevent such cross-domain attacks.
The operational impact of this stored XSS vulnerability is severe because it persists on the server side until manually removed from the database or content repository. Unlike reflected XSS which requires tricking a user into clicking a malicious link, stored XSS ensures that every visitor who views the compromised page becomes a potential victim without any additional interaction required beyond normal browsing behavior. Attackers can leverage this capability to steal session cookies, hijack administrative accounts if they have access to sensitive areas of the site, perform actions on behalf of authenticated users, or redirect victims to phishing sites designed to harvest credentials. In enterprise environments running Drupal, this could lead to significant data breaches, reputational damage, and compliance violations depending on the nature of the stored information.
Mitigation strategies must focus on immediate remediation through software updates and enhanced input validation practices. The primary recommendation is to upgrade the Data field module to a version later than 2.0.14 where these sanitization issues have been addressed by the development team. If upgrading is not immediately feasible, administrators should implement strict content security policies that restrict script execution sources and disable inline scripts via Content-Security-Policy headers. Additionally, developers must ensure that all user inputs are rigorously validated against expected formats and encoded appropriately before being rendered in HTML contexts using established library functions provided by the Drupal framework rather than custom or ad-hoc encoding methods. Regular security audits and penetration testing should be conducted to verify that similar input handling flaws do not exist elsewhere in the application logic.