CVE-2026-2345 (GCVE-0-2026-2345)

Vulnerability from cvelistv5 – Published: 2026-02-11 14:49 – Updated: 2026-02-11 21:19
VLAI
Title
Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers
Summary
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.
Severity
3.6 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 21:19 UTC
CWE
  • CWE-346 - Origin Validation Error
Assigner
Hackrate CNA under the icscert root
CNA scorecard B 87/100 over 11 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Proctorio Secure Exam Proctor Extension Affected: 1.5.25220.33
Unaffected: 1.5.25220.36
guessed Create a notification for this product.
Credits
Caen Jones (@vcc3v)
Show details on NVD website
To clipboard 

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