# firefox 123.0+build3-0ubuntu0.20.04.1: firefox 123.0+build3-0ubuntu0.20.04.1 for Ubuntu 20.04 LTS (focal)

firefox 123.0+build3-0ubuntu0.20.04.1, released February 20, 2024, fixes 12 CVEs in firefox. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-123.0-build3-0ubuntu0.20.04.1
- Platform: Linux
- Released: Feb 20, 2024
- Priority: High (Closes CVE-2024-1553, high severity)
- CVEs: 12, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | Ubuntu 20.04 LTS (focal) | 123.0+build3-0ubuntu0.20.04.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [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-2024-1552](https://patchblox.com/security/data/cve/CVE-2024-1552.md) | High | firefox: ELSA-2024-0955: firefox security update (IMPORTANT) | 7.5 | 0.0067 |  |
| [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 |  |

---

Data as of 2026-11-14T02:05:58Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.