CVE-2026-2345 Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-2345?
CVE-2026-2345 is a low-severity vulnerability in Proctorio Secure Exam Proctor Extension, published on 11 Feb 2026.
Official 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: CWE-346
Which versions are affected by CVE-2026-2345?
How do I fix CVE-2026-2345?
No fix has been published for CVE-2026-2345 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-2345 being exploited?
There is no known exploitation of CVE-2026-2345 in the wild and no public exploit code.
Sources
Also known as GHSA-f688-gwj3-8h54.