CVE-2026-2345
Low
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.
SeverityLow
CVSS3.6
Exploit probability—
ProductSecure Exam Proctor Extension
PublishedFeb 11, 2026
First seenFeb 11, 2026
Weakness typeCWE-346CWE-346
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Proctorio Secure Exam Proctor Extension | 1.5.25220.33 | — |
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