# CVE-2022-28283: Mozilla Firefox ESR and 2 others: Files or Directories Accessible to External Parties

CVE-2022-28283 is fixed in 5 products on 2 platforms, first by Mozilla Firefox (en-US) 99.0, released April 5, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-28283
- Priority: Routine
- CVSS: 6.5 (Medium)
- EPSS: 0.0060
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 6, 2022
- Weakness: CWE-552: Files or Directories Accessible to External Parties
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-28283

## Description

The sourceMapURL feature in devtools was missing security checks that would have allowed a webpage to attempt to include local files or other files that should have been inaccessible. This vulnerability affects Firefox < 99.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 99.0 | [Mozilla Firefox (en-US) 99.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-99.0.md) | Apr 5, 2022 |
| Windows apps | Mozilla Firefox ESR (en-US) | 102.0 | [Mozilla Firefox ESR (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-102.0.md) | Jun 23, 2022 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 99.0+build2-0ubuntu0.18.04.2 | [firefox 99.0+build2-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-99.0-build2-0ubuntu0.18.04.2.md) | Apr 6, 2022 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 99.0+build2-0ubuntu0.20.04.2 | [firefox 99.0+build2-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-99.0-build2-0ubuntu0.20.04.2.md) | Apr 6, 2022 |
| Linux | firefox Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-firefox-1-1snap1-0ubuntu1.md) | Apr 6, 2022 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 99.0+build2-0ubuntu0.18.04.2 | [firefox-geckodriver 99.0+build2-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-99.0-build2-0ubuntu0.18.04.2.md) | Apr 6, 2022 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 99.0+build2-0ubuntu0.20.04.2 | [firefox-geckodriver 99.0+build2-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-99.0-build2-0ubuntu0.20.04.2.md) | Apr 6, 2022 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 99.0+build2-0ubuntu0.18.04.2 | [firefox-mozsymbols 99.0+build2-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-99.0-build2-0ubuntu0.18.04.2.md) | Apr 6, 2022 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 99.0+build2-0ubuntu0.20.04.2 | [firefox-mozsymbols 99.0+build2-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-99.0-build2-0ubuntu0.20.04.2.md) | Apr 6, 2022 |

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Data as of 2026-11-08T06:59:42Z 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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