A prominent Chrome browser extension has been identified for intercepting AI chat conversations from millions of users. This discovery, reported in December 2025, highlights a critical privacy and security vulnerability within the browser ecosystem.

Users engaging with various AI platforms through this extension had their private conversations and data exposed. The malicious activity demonstrates the significant risks associated with installing unverified or compromised browser add-ons.

The Scope of the Interception

The interception affected a vast number of individuals, underscoring the widespread nature of the threat. The extension’s functionality allowed it to surreptitiously access and transmit user interactions with AI services, compromising data confidentiality.

This incident serves as a stark reminder for users to exercise caution when granting permissions to browser extensions. Regular audits of installed extensions and adherence to best security practices are crucial steps in protecting personal and sensitive information online.

Mitigating Browser Extension Risks

Cybersecurity experts recommend reviewing all installed browser extensions, ensuring they are from trusted developers and have legitimate purposes. Limiting permissions granted to extensions to only what is strictly necessary can also help mitigate potential risks.

The incident emphasizes the ongoing need for vigilance against sophisticated methods employed by threat actors to compromise user data through seemingly innocuous software components. This type of threat requires continuous awareness and proactive security measures from both users and platform providers.

Source: https://thehackernews.com/2025/12/featured-chrome-browser-extension.html