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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-5168 from the MITRE CVE dictionary dictionary and NIST NVD.
| CVSS3 Base Score | 6.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (thunderbird) | RHSA-2018:1725 | 2018-05-24 |
| Red Hat Enterprise Linux 7 (firefox) | RHSA-2018:1415 | 2018-05-14 |
| Red Hat Enterprise Linux 6 (firefox) | RHSA-2018:1414 | 2018-05-14 |
| Red Hat Enterprise Linux 6 (thunderbird) | RHSA-2018:1726 | 2018-05-24 |
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