# CVE-2022-45417: Mozilla Firefox and 2 others: Improper Restriction of Rendered UI Layers or Frames

CVE-2022-45417 is fixed in 2 products on 1 platform, first by Mozilla Firefox (en-US) 107.0, released November 15, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-45417
- Priority: Routine
- CVSS: 4.3
- EPSS: 0.0044
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 22, 2022
- Weakness: CWE-1021: Improper Restriction of Rendered UI Layers or Frames
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-45417

## Description

Service Workers did not detect Private Browsing Mode correctly in all cases, which could have led to Service Workers being written to disk for websites visited in Private Browsing Mode. This would not have persisted them in a state where they would run again, but it would have leaked Private Browsing Mode details to disk. This vulnerability affects Firefox < 107.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 107.0 | [Mozilla Firefox (en-US) 107.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-107.0.md) | Nov 15, 2022 |
| Windows apps | Mozilla Firefox ESR (en-US) | 115.4.0 | [Mozilla Firefox ESR (en-US) 115.4.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-115.4.0.md) | Oct 17, 2023 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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