Proton: Exploit

Avoid clicking unexpected links in emails, even from seemingly secure providers.

The Sonar Research team identified the vulnerability during a routine audit of Proton's open-source repositories. The issue stemmed from how the web application handled user-controlled HTML. While senders need the ability to style messages, failing to properly sanitize certain tags can allow malicious tags to execute in a reader's browser. How the Exploit Worked Proton Exploit

An attacker would need to send two carefully crafted emails to the target. Avoid clicking unexpected links in emails, even from

Proton maintained its commitment to security through its Responsible Vulnerability Disclosure Policy . While senders need the ability to style messages,

Add details about other recent fixes (like the patch). Include SEO keywords tailored for cybersecurity audiences. Proton Mail's responsible vulnerability disclosure policy

The attack required a specific sequence of actions to succeed, which limited its real-world viability: