CVE-2026-2345
Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers
- State
- Published
- Severity
- 3.6 Low
- Published
- Feb 11, 2026
- Updated
- Feb 11, 2026
- Reserved
- Feb 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.6 Low | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N | Hackrate |
Weaknesses
- CWE-346 Origin Validation Error
Affected Products
| Product | Versions |
|---|---|
Secure Exam Proctor ExtensionProctorio |
|
References
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