CVE-2026-2345 — LOW (3.6) — White Hats Nepal

Vulnerability 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.

CVSS Score

3.6

LOW

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-346

References

https://www.hckrt.com/hacktivity/46b61f36-b685-4667-aebf-82a67ad69ad6

FAQ

What is CVE-2026-2345?

CVE-2026-2345 is a vulnerability with a CVSS score of 3.6 (LOW). 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 ...

How severe is CVE-2026-2345?

CVE-2026-2345 has been rated LOW with a CVSS base score of 3.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-2345?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.