# Mozilla Firefox (en-US) 123.0

Mozilla Firefox (en-US) 123.0, released February 26, 2024, fixes 12 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: Urgent. 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-123.0
- Platform: Windows apps
- Released: Feb 26, 2024
- Priority: Urgent (Closes CVE-2024-2614, rated Critical)
- CVEs: 12, 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- Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes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) |  | 123.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-2614](https://patchblox.com/security/data/cve/CVE-2024-2614.md) | Urgent | Mozilla Firefox ESR and 5 others: Out-of-bounds Write | 8.8 | 0.0089 |  |
| [CVE-2024-1553](https://patchblox.com/security/data/cve/CVE-2024-1553.md) | High | Mozilla Firefox ESR and 5 others: Improper Restriction of Operations within the Bounds of a Memory Buffer | 8.1 | 0.0087 |  |
| [CVE-2024-1546](https://patchblox.com/security/data/cve/CVE-2024-1546.md) | High | Mozilla Firefox ESR and 5 others: Out-of-bounds Read | 7.5 | 0.0072 |  |
| [CVE-2024-1547](https://patchblox.com/security/data/cve/CVE-2024-1547.md) | High | Mozilla Firefox ESR and 5 others: Authentication Bypass by Spoofing | 7.5 | 0.0068 |  |
| [CVE-2024-1557](https://patchblox.com/security/data/cve/CVE-2024-1557.md) | High | Mozilla Firefox ESR and 3 others: Out-of-bounds Write | 8.1 | 0.0056 |  |
| [CVE-2024-1555](https://patchblox.com/security/data/cve/CVE-2024-1555.md) | High | Mozilla Firefox ESR and 3 others: Authentication Bypass by Spoofing | 8.3 | 0.0048 |  |
| [CVE-2024-1554](https://patchblox.com/security/data/cve/CVE-2024-1554.md) | High | Mozilla Firefox ESR and 3 others: Insufficient Verification of Data Authenticity | 9.8 | 0.0038 |  |
| [CVE-2024-1548](https://patchblox.com/security/data/cve/CVE-2024-1548.md) | Routine | Mozilla Firefox ESR and 5 others: A website could have obscured the fullscreen notification by using a dropdown select input element. | 6.1 | 0.0095 |  |
| [CVE-2024-1551](https://patchblox.com/security/data/cve/CVE-2024-1551.md) | Routine | Mozilla Firefox ESR and 5 others: Reliance on Cookies without Validation and Integrity Checking | 6.1 | 0.0074 |  |
| [CVE-2024-1550](https://patchblox.com/security/data/cve/CVE-2024-1550.md) | Routine | Mozilla Firefox ESR and 5 others: Improper Restriction of Rendered UI Layers or Frames | 6.1 | 0.0058 |  |
| [CVE-2024-1549](https://patchblox.com/security/data/cve/CVE-2024-1549.md) | Routine | Mozilla Firefox ESR and 5 others: If a website set a large custom cursor, portions of the cursor could have overlapped with the permission… | 6.1 | 0.0053 |  |
| [CVE-2024-1556](https://patchblox.com/security/data/cve/CVE-2024-1556.md) | Routine | Mozilla Firefox ESR and 3 others: Improper Check for Unusual or Exceptional Conditions | 6.5 | 0.0047 |  |

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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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