CVE-2025-50005 in Composer Plugin
Summary
by MITRE • 01/22/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in tagDiv tagDiv Composer td-composer allows DOM-Based XSS.This issue affects tagDiv Composer: from n/a through <= 5.4.2.
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Analysis
by VulDB Data Team • 01/22/2026
This vulnerability represents a critical cross-site scripting flaw in the tagDiv Composer td-composer web application, specifically categorized as a DOM-based XSS vulnerability under CWE-79. The issue arises from improper neutralization of input during web page generation processes, creating a pathway for malicious attackers to inject client-side scripts into web applications. The vulnerability affects all versions of tagDiv Composer up to and including version 5.4.2, indicating a widespread exposure across multiple releases. The DOM-based nature of this vulnerability means that the malicious script is executed in the victim's browser through manipulation of the Document Object Model rather than traditional server-side input handling methods, making it particularly challenging to detect and mitigate.
The technical flaw manifests when the tagDiv Composer application fails to properly sanitize or escape user-controllable input parameters that are subsequently processed and rendered within the browser environment. This allows attackers to craft malicious payloads that exploit the application's handling of dynamic content generation, potentially leading to unauthorized actions performed on behalf of authenticated users. The vulnerability's impact extends beyond simple script execution, as it can enable session hijacking, credential theft, and other malicious activities that compromise the security of both the application and its users. Attackers can leverage this weakness to manipulate the DOM structure of web pages, potentially redirecting users to malicious sites or extracting sensitive information from the browser's context.
The operational impact of this vulnerability is substantial, as it can affect any user interacting with the affected web application, particularly those with administrative privileges or sensitive data access. DOM-based XSS vulnerabilities are particularly dangerous because they can persist across multiple page loads and are often difficult to detect through standard security scanning tools. The vulnerability creates an attack surface that allows adversaries to exploit trust relationships between users and the application, potentially leading to unauthorized data access, privilege escalation, or complete system compromise. Organizations relying on tagDiv Composer for content management or web development may face significant security risks if this vulnerability remains unpatched, as it provides attackers with a persistent means of executing malicious code within user browsers.
Mitigation strategies should focus on immediate patching of affected versions to version 5.4.3 or later, which contains the necessary security fixes. Organizations should also implement comprehensive input validation and output encoding mechanisms to prevent similar vulnerabilities in custom implementations. The remediation approach should align with ATT&CK framework tactics related to defense evasion and privilege escalation, ensuring that all user inputs are properly sanitized before being processed or rendered within the browser environment. Additional protective measures include implementing Content Security Policy headers, regular security assessments of web applications, and comprehensive staff training on secure coding practices to prevent future occurrences of similar vulnerabilities.