# CVE-2023-28159: Mozilla Firefox and 2 others: Improper Restriction of Rendered UI Layers or Frames

CVE-2023-28159 is fixed in 2 products on 1 platform, first by Mozilla Firefox (en-US) 111.0, released March 16, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-28159
- Priority: Routine
- CVSS: 4.3
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 2, 2023
- Weakness: CWE-1021: Improper Restriction of Rendered UI Layers or Frames
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-28159

## Description

The fullscreen notification could have been hidden on Firefox for Android by using download popups, resulting in potential user confusion or spoofing attacks. <br>*This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 111.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 111.0 | [Mozilla Firefox (en-US) 111.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-111.0.md) | Mar 16, 2023 |
| 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 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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