CVE-2026-2345 - Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers

CVE ID : CVE-2026-2345 Published : Feb. 11, 2026, 2:49 p.m. | 29 minutes ago Description : Proctorio Chrome Extension is a browser extension used for online proctoring. The extension contains multiple window.addEventListener('message', ...) handlers that do not properly validate the origin of incoming messages. Specifically, an internal messaging bridge processes messages based solely on the presence of a fromWebsite property without verifying the event.origin attribute. Severity: 3.6 | LOW Visit the link for more details, such as CVSS details, affected products, timeline, and more...