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I. Basic Information for CVE-2026-2345
Vulnerability Information

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Vulnerability Title
Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
源验证错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
Proctorio Secure Exam Proctor Extension 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Proctorio Secure Exam Proctor Extension是Proctorio公司的一个在线监考插件。 Proctorio Secure Exam Proctor Extension存在安全漏洞,该漏洞源于消息处理程序未正确验证消息来源,可能导致处理恶意消息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
ProctorioSecure Exam Proctor Extension 1.5.25220.33 -
II. Public POCs for CVE-2026-2345
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III. Intelligence Information for CVE-2026-2345
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IV. Related Vulnerabilities
V. Comments for CVE-2026-2345

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