CVE-2025-31682 in Google Tag
Summary
by MITRE • 04/01/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Google Tag allows Cross-Site Scripting (XSS).This issue affects Google Tag: from 0.0.0 before 1.8.0, from 2.0.0 before 2.0.8.
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Analysis
by VulDB Data Team • 06/02/2025
The vulnerability identified as CVE-2025-31682 represents a critical cross-site scripting weakness within the Drupal Google Tag module, specifically impacting versions prior to 1.8.0 and 2.0.8. This vulnerability stems from inadequate input validation and sanitization during web page generation processes, creating exploitable entry points for malicious actors to inject harmful scripts into web applications. The affected module operates within the Drupal content management system ecosystem, where it facilitates integration with Google's tagging services for analytics and advertising purposes.
The technical flaw manifests when user-supplied input containing malicious script code is improperly processed and rendered within web pages without adequate sanitization measures. This occurs during the web page generation phase where the module fails to neutralize potentially dangerous characters and script sequences that could be executed in the context of a victim's browser. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically representing a failure in input validation and output encoding mechanisms. Attackers can exploit this weakness by crafting malicious payloads that leverage the module's lack of proper sanitization controls during content rendering.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, deface websites, steal sensitive user data, or redirect users to malicious domains. When exploited, the XSS vulnerability allows unauthorized individuals to inject malicious scripts that can access cookies, session tokens, and other sensitive information stored in the user's browser. The attack surface is particularly concerning given that the Google Tag module typically operates with elevated privileges and may be used by administrators or trusted users, potentially providing attackers with additional attack vectors. This vulnerability can be exploited across multiple user contexts and may affect both authenticated and unauthenticated users depending on the specific implementation.
Organizations utilizing affected Drupal installations should prioritize immediate remediation by upgrading to versions 1.8.0 or 2.0.8 where the XSS vulnerability has been addressed through proper input sanitization and output encoding controls. The mitigation strategy should include implementing comprehensive input validation mechanisms, deploying Content Security Policy headers, and conducting regular security assessments of third-party modules. Additionally, administrators should consider implementing web application firewalls and monitoring for suspicious input patterns. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through malicious web content, highlighting the importance of robust input validation as a fundamental security control. The remediation process should also include comprehensive testing to ensure that the patched version functions correctly without introducing regressions in the module's core functionality while maintaining the security improvements necessary to prevent future exploitation attempts.