CVE-2026-2345 (GCVE-0-2026-2345)
Vulnerability from cvelistv5 – Published: 2026-02-11 14:49 – Updated: 2026-02-11 21:19
VLAI
EPSS
VEX
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
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
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Proctorio | Secure Exam Proctor Extension |
Affected:
1.5.25220.33
Unaffected: 1.5.25220.36 |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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