CVE-2025-69151 in Grand Car Rental Plugin
Summary
by MITRE • 06/17/2026
Unauthenticated Cross Site Scripting (XSS) in Grand Car Rental <= 3.7 versions.
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Analysis
by VulDB Data Team • 06/17/2026
The vulnerability identified as unauthenticated cross site scripting in Grand Car Rental versions 3.7 and earlier represents a critical security flaw that allows attackers to inject malicious scripts into web pages viewed by users without requiring authentication credentials. This type of vulnerability falls under the CWE-79 category known as "Cross-site Scripting" and specifically manifests as a stored or reflected XSS attack vector. The vulnerability exists within the web application's input validation mechanisms where user-supplied data is not properly sanitized before being rendered back to users, creating an environment where malicious scripts can execute in the context of the victim's browser session.
The technical implementation of this vulnerability stems from inadequate data sanitization practices within the application's core components, particularly in areas where user inputs are processed and displayed. Attackers can exploit this weakness by submitting malicious script payloads through various input fields such as search parameters, booking forms, or user profile sections that do not adequately filter or escape special characters. When other users access pages containing this malicious content, the injected scripts execute in their browsers, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The vulnerability's unauthenticated nature means that any user can exploit it without needing valid login credentials, significantly expanding the attack surface and making it particularly dangerous for web applications that handle sensitive customer data.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack chains that compromise the entire web application ecosystem. An attacker could leverage this vulnerability to steal session cookies, redirect users to phishing sites, or even perform actions on behalf of authenticated users through session manipulation techniques. The attack vector typically involves crafting malicious payloads using javascript code or other scripting languages that exploit the application's failure to properly validate and sanitize user inputs. This vulnerability directly maps to several ATT&CK techniques including T1566 for social engineering and T1059 for command and scripting interpreter, demonstrating how the vulnerability can be weaponized to create persistent threats within the application environment.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and output encoding mechanisms throughout the application's codebase. Organizations should implement comprehensive sanitization routines that filter or escape special characters in all user-supplied inputs before processing or displaying them. The recommended approach includes implementing Content Security Policy headers, utilizing proper HTML encoding functions, and employing parameterized queries where applicable. Security patches should be applied immediately to upgrade to versions that address this vulnerability, while organizations should also consider implementing web application firewalls and regular security scanning to detect similar weaknesses. Additionally, comprehensive staff training on secure coding practices and regular vulnerability assessments can help prevent similar issues in future development cycles, ensuring that applications follow established security frameworks and industry best practices for preventing cross site scripting attacks.