# CVE-2018-5168: firefox: Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property...

CVE-2018-5168 is fixed in 12 products on 1 platform, first by firefox 60.0+build2-0ubuntu1, released May 10, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-5168
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0233
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 9, 2018

## Description

Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 60.0+build2-0ubuntu1 | [firefox 60.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-60.0-build2-0ubuntu1.md) | May 10, 2018 |
| Linux | firefox-globalmenu Ubuntu 18.04.6 LTS (bionic) | 60.0+build2-0ubuntu1 | [firefox-globalmenu 60.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-globalmenu-60.0-build2-0ubuntu1.md) | May 10, 2018 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 60.0+build2-0ubuntu1 | [firefox-mozsymbols 60.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-60.0-build2-0ubuntu1.md) | May 10, 2018 |
| Linux | firefox-testsuite Ubuntu 18.04.6 LTS (bionic) | 60.0+build2-0ubuntu1 | [firefox-testsuite 60.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-testsuite-60.0-build2-0ubuntu1.md) | May 10, 2018 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [thunderbird 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | thunderbird-globalmenu Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [thunderbird-globalmenu 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | thunderbird-testsuite Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [thunderbird-testsuite 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-testsuite-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:52.8.0+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:52.8.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-52.8.0-build1-0ubuntu0.18.04.1.md) | May 22, 2018 |

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