# Mozilla Firefox (en-US) 117.0

Mozilla Firefox (en-US) 117.0, released August 30, 2023, fixes 13 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-117.0
- Platform: Windows apps
- Released: Aug 30, 2023
- Priority: High (Closes CVE-2023-4576, high severity)
- CVEs: 13, 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- Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes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) |  | 117.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-4576](https://patchblox.com/security/data/cve/CVE-2023-4576.md) | High | Integer Overflow in RecordedSourceSurfaceCreation | 8.6 | 0.0082 |  |
| [CVE-2023-4584](https://patchblox.com/security/data/cve/CVE-2023-4584.md) | High | Memory safety bugs fixed in Firefox 117, Firefox ESR 102.15, Firefox ESR 115.2, Thunderbird 102.15, and Thunderbird 115.2 | 8.8 | 0.0080 |  |
| [CVE-2023-4585](https://patchblox.com/security/data/cve/CVE-2023-4585.md) | High | Memory safety bugs fixed in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2 | 8.8 | 0.0077 |  |
| [CVE-2023-4583](https://patchblox.com/security/data/cve/CVE-2023-4583.md) | High | Browsing Context potentially not cleared when closing Private Window | 8.8 | 0.0069 |  |
| [CVE-2023-4574](https://patchblox.com/security/data/cve/CVE-2023-4574.md) | High | Memory corruption in IPC ColorPickerShownCallback | 8.8 | 0.0066 |  |
| [CVE-2023-4575](https://patchblox.com/security/data/cve/CVE-2023-4575.md) | High | Memory corruption in IPC FilePickerShownCallback | 8.8 | 0.0066 |  |
| [CVE-2023-4577](https://patchblox.com/security/data/cve/CVE-2023-4577.md) | High | Memory corruption in JIT UpdateRegExpStatics | 8.8 | 0.0065 |  |
| [CVE-2023-4573](https://patchblox.com/security/data/cve/CVE-2023-4573.md) | High | Memory corruption in IPC CanvasTranslator | 8.8 | 0.0063 |  |
| [CVE-2023-4578](https://patchblox.com/security/data/cve/CVE-2023-4578.md) | High | Error reporting methods in SpiderMonkey could have triggered an Out of Memory Exception | 8.8 | 0.0062 |  |
| [CVE-2023-4581](https://patchblox.com/security/data/cve/CVE-2023-4581.md) | High | XLL file extensions were downloadable without warnings | 8.8 | 0.0057 |  |
| [CVE-2023-4580](https://patchblox.com/security/data/cve/CVE-2023-4580.md) | High | Push notifications saved to disk unencrypted | 8.8 | 0.0042 |  |
| [CVE-2023-5732](https://patchblox.com/security/data/cve/CVE-2023-5732.md) | Routine | Address bar spoofing via bidirectional characters | 6.5 | 0.0105 |  |
| [CVE-2023-4579](https://patchblox.com/security/data/cve/CVE-2023-4579.md) | Routine | Persisted search terms were formatted as URLs | 3.1 | 0.0045 |  |

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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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