CVE-2023-5718: Vuejs Devtools

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The Vue.js Devtools extension was found to leak screenshot data back to a malicious web page via the standard `postMessage()` API. By creating a malicious web page with an iFrame targeting a sensitive resource (i.e. a locally accessible file or sensitive website), and registering a listener on the web page, the extension sent messages back to the listener, containing the base64 encoded screenshot data of the sensitive resource.

Affected products

• Vuejs Devtools: version 6.5.0 only

Published 2023-10-23. Last modified 2026-06-17.