CVE-2026-57734
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in tagDiv tagDiv Composer td-composer allows Reflected XSS.This issue affects tagDiv Composer: from n/a through <= 5.4.3.
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Analysis
by VulDB Data Team • 07/13/2026
The vulnerability under discussion represents a classic cross-site scripting flaw that has significant implications for web application security and user data protection. This weakness manifests specifically within the tagDiv Composer td-composer component, where inadequate input sanitization during web page generation creates opportunities for malicious actors to inject harmful scripts into web pages viewed by other users. The issue falls squarely under the category of reflected cross-site scripting as defined by the CWE-79 standard, which classifies this as a weakness in web applications that fail to properly neutralize user-supplied input before incorporating it into dynamically generated web content.
The technical implementation of this vulnerability occurs when the tagDiv Composer component processes user input without adequate validation or sanitization measures. When malicious payloads are submitted through parameters or input fields that are subsequently reflected back to users in the generated web pages, attackers can execute arbitrary JavaScript code within the victim's browser context. This typically happens when the application directly incorporates user-supplied data into HTML output without proper encoding or filtering mechanisms. The affected version range indicates that all versions up to and including 5.4.3 contain this vulnerability, suggesting it has been present for an extended period and likely affects numerous installations across various web environments.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as reflected XSS attacks can enable sophisticated attack vectors including credential harvesting, browser manipulation, and redirection to malicious sites. Attackers can craft specially designed URLs or forms that when clicked by unsuspecting users, execute malicious scripts that can steal cookies, modify page content, or even perform actions on behalf of the authenticated user. This vulnerability particularly affects websites using the tagDiv Composer for content management, making it a significant concern for publishers, bloggers, and businesses relying on this platform for their web presence. The reflected nature of the attack means that victims must be tricked into clicking malicious links, but once executed, the impact can be severe as the malicious scripts operate within the legitimate user context.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected systems to version 5.4.4 or later where the XSS protection has been implemented. Organizations should also implement comprehensive input validation and output encoding mechanisms throughout their web applications to prevent similar issues from occurring in other components. The implementation of Content Security Policy headers can provide additional defense-in-depth measures, while regular security audits and code reviews help identify potential injection points that could be exploited. According to ATT&CK framework categorization, this vulnerability aligns with T1566.001 (Phishing) and T1059.007 (Scripting), as attackers can leverage the reflected XSS to execute malicious scripts and potentially gain unauthorized access to user sessions. Security teams should also consider implementing web application firewalls to detect and block suspicious input patterns, while establishing incident response procedures for rapid remediation when similar vulnerabilities are discovered in other components of their infrastructure.