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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.

PUBLISHED Reserved 2026-02-11 | Published 2026-02-11 | Updated 2026-02-11 | Assigner Hackrate




LOW: 3.6CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Problem types

CWE-346 Origin Validation Error

Product status

Default status
unaffected

1.5.25220.33
affected

1.5.25220.36
unaffected

Credits

Caen Jones (@vcc3v) reporter

References

www.hckrt.com/...tivity/46b61f36-b685-4667-aebf-82a67ad69ad6

cve.org (CVE-2026-2345)

nvd.nist.gov (CVE-2026-2345)

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