VULNERABILITY INTELLIGENCE

CVE-2026-2345

CVSS score3.6 LOW
EPSS probability0.08%
CISA KEVNot currently listed
Published2026-02-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

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.

Weakness classification

  • 7004884b-51e2-48e8-b4a2-5ca29e80453e: CWE-346

Primary references