XSS Vulnerability Found in Proton Mail - Incident Description

The article discusses a serious issue related to code vulnerabilities that could lead to unauthorized disclosure of email addresses in the ProtonMail service. The authors point out that although ProtonMail is a platform focused on user privacy, code flaws can significantly undermine this promise. It details how specific implementation errors within the application can result in personal data leaks for users. Furthermore, it outlines ProtonMail’s response to these issues and their plans for future updates aimed at enhancing security. The concluding remarks emphasize the importance of ongoing software testing and security audits to reduce the risk of such vulnerabilities occurring in the future.