# CVE-2017-7831: firefox: A vulnerability where the security wrapper does not deny access to someexposed properties using the deprecated "_expo...

CVE-2017-7831 is fixed in 4 products on 1 platform, first by firefox 57.0.1+build2-0ubuntu1, released November 15, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-7831
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0156
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 14, 2017

## Description

A vulnerability where the security wrapper does not deny access to someexposed properties using the deprecated "_exposedProps_" mechanism on proxyobjects. These properties should be explicitly unavailable to proxyobjects. This vulnerability affects Firefox < 57.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox Ubuntu 24.10 (oracular) | 57.0.1+build2-0ubuntu1 | [firefox 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-firefox-57.0.1-build2-0ubuntu1.md) | Nov 15, 2017 |
| Linux | firefox Ubuntu 25.04 (plucky) | 57.0.1+build2-0ubuntu1 | [firefox 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-firefox-57.0.1-build2-0ubuntu1.md) | Nov 15, 2017 |
| Linux | firefox-globalmenu Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-globalmenu 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-globalmenu-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-mozsymbols 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox-testsuite Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-testsuite 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-testsuite-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |

---

Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo