CVE-2025-67952 in Grand Tour Plugin
Summary
by MITRE • 01/22/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeGoods Grand Tour grandtour allows Reflected XSS.This issue affects Grand Tour: from n/a through < 5.6.2.
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Analysis
by VulDB Data Team • 01/22/2026
This vulnerability represents a classic cross-site scripting flaw that exploits improper input sanitization during web page generation processes. The weakness specifically manifests in the ThemeGoods Grand Tour grandtour web application where user-supplied input is not adequately neutralized before being rendered in web pages. This reflects a fundamental failure in input validation and output encoding mechanisms that allows malicious actors to inject arbitrary script code into web responses. The vulnerability operates through a reflected attack vector where malicious payloads are embedded in URLs or request parameters and then reflected back to users, making it particularly dangerous for web applications that process user input directly in their output generation.
The technical implementation of this vulnerability stems from insufficient sanitization of user-controllable data within the application's rendering pipeline. When the grandtour application processes incoming requests containing unvalidated input parameters, it fails to properly encode or escape special characters that could be interpreted as HTML or JavaScript code. This creates an environment where attackers can craft malicious URLs containing script tags or other executable code that gets rendered in the context of legitimate user sessions. The vulnerability affects all versions prior to 5.6.2, indicating that this was a known issue that was subsequently patched but remained exploitable in older releases.
The operational impact of this reflected cross-site scripting vulnerability extends beyond simple data theft or session hijacking. Attackers can leverage this weakness to perform a variety of malicious activities including but not limited to cookie theft, session fixation attacks, and redirection to malicious sites. The reflected nature of the attack means that victims must be tricked into clicking malicious links, often through social engineering tactics or phishing campaigns. This vulnerability can be particularly damaging in business environments where the grandtour application might be used for customer-facing websites, as it could allow attackers to compromise user sessions and potentially gain unauthorized access to sensitive information. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application stack. Organizations should immediately upgrade to version 5.6.2 or later where the vulnerability has been patched. Additionally, developers should implement strict content security policies, employ proper HTML entity encoding for all dynamic content, and utilize framework-level protections against XSS attacks. The implementation of secure coding practices including input sanitization, output encoding, and proper error handling should be enforced across all web application components. Security teams should also consider implementing web application firewalls and runtime application self-protection mechanisms to provide additional layers of defense against reflected XSS attacks. This vulnerability demonstrates the critical importance of following secure development practices and maintaining up-to-date security patches as outlined in various cybersecurity frameworks and standards including those referenced in the ATT&CK framework's web application attack patterns.