# CVE-2023-29534: Security feature bypass in Firefox for Android

> Attackers can obscure fullscreen notifications in Firefox and Focus for Android, enabling user confusion and spoofing attacks.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Jun 2023
- **Updated:** 11 Dec 2024
- **Also known as:** GHSA-4g28-wh72-jhwq, UBUNTU-CVE-2023-29534

## What is CVE-2023-29534?

CVE-2023-29534 is a critical vulnerability in Mozilla Firefox Mobile, published on 19 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android.  These could have led to potential user confusion and spoofing attacks.

*This bug only affects Firefox and Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox for Android < 112 and Focus for Android < 112.

## Which versions are affected by CVE-2023-29534?

It affects 2 products.


Products: Mozilla Firefox Focus, Mozilla Firefox Mobile.

## How do I fix CVE-2023-29534?

Upgrade to a fixed version.

## Is CVE-2023-29534 being exploited?

There is no known exploitation of CVE-2023-29534 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Firefox Mobile

- [CVE-2024-10474](https://insights.sbomify.com/CVE-2024-10474/): Security feature bypass in Focus for iOS (critical 9.1)
- [CVE-2024-1563](https://insights.sbomify.com/CVE-2024-1563/): Race condition in Focus for iOS (high 8.1)
- [CVE-2024-0605](https://insights.sbomify.com/CVE-2024-0605/): Race condition in Focus for iOS (high 7.5)
- [CVE-2023-25743](https://insights.sbomify.com/CVE-2023-25743/): Security feature bypass in Firefox (high 7.5)
- [CVE-2025-10290](https://insights.sbomify.com/CVE-2025-10290/): Other in Focus for iOS (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-29534 and fix it if it is affected.

What it is: CVE-2023-29534 is a critical vulnerability in Mozilla Firefox Mobile, published on 19 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-29534 in the wild and no public exploit code.

Affected product: Mozilla Firefox Mobile. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-29534/ (Markdown: https://insights.sbomify.com/CVE-2023-29534/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-29534
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-29534
- OSV: https://osv.dev/vulnerability/CVE-2023-29534

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-29534/
Summaries are generated and may contain mistakes; the official description above is the record.