# Mozilla Firefox (en-US) 119.0

Mozilla Firefox (en-US) 119.0, released October 24, 2023, fixes 10 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.firefox-119.0
- Platform: Windows apps
- Released: Oct 24, 2023
- Priority: High (Closes CVE-2023-5730, high severity)
- CVEs: 10, exploited: 0, on CISA KEV: 0
- Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Mozilla Firefox (en-US)](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md) |  | 119.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-5730](https://patchblox.com/security/data/cve/CVE-2023-5730.md) | High | Mozilla Firefox ESR and 5 others: Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. | 9.8 | 0.0154 |  |
| [CVE-2023-5724](https://patchblox.com/security/data/cve/CVE-2023-5724.md) | High | Mozilla Firefox ESR and 5 others: Uncontrolled Resource Consumption | 7.5 | 0.0152 |  |
| [CVE-2023-5728](https://patchblox.com/security/data/cve/CVE-2023-5728.md) | High | Mozilla Firefox ESR and 5 others: Use After Free | 7.5 | 0.0132 |  |
| [CVE-2023-5731](https://patchblox.com/security/data/cve/CVE-2023-5731.md) | High | Mozilla Firefox ESR and 3 others: Memory safety bugs present in Firefox 118. | 9.8 | 0.0115 |  |
| [CVE-2023-5721](https://patchblox.com/security/data/cve/CVE-2023-5721.md) | High | Mozilla Firefox ESR and 5 others: It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally… | 7.5 | 0.0081 |  |
| [CVE-2023-5725](https://patchblox.com/security/data/cve/CVE-2023-5725.md) | Routine | Mozilla Firefox ESR and 5 others: A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could… | 6.1 | 0.0094 |  |
| [CVE-2023-5727](https://patchblox.com/security/data/cve/CVE-2023-5727.md) | Routine | Mozilla Firefox ESR and 5 others: The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle… | 6.5 | 0.0083 |  |
| [CVE-2023-5723](https://patchblox.com/security/data/cve/CVE-2023-5723.md) | Routine | Mozilla Firefox ESR and 3 others: An attacker with temporary script access to a site could have set a cookie containing invalid characters… | 5.3 | 0.0070 |  |
| [CVE-2023-5729](https://patchblox.com/security/data/cve/CVE-2023-5729.md) | Routine | Mozilla Firefox ESR and 3 others: A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. | 4.3 | 0.0070 |  |
| [CVE-2023-5722](https://patchblox.com/security/data/cve/CVE-2023-5722.md) | Routine | Mozilla Firefox ESR and 3 others: Using iterative requests an attacker was able to learn the size of an opaque response, as well as the… | 5.3 | 0.0065 |  |

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Data as of 2026-11-09T07:25:28Z 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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