| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 52.8.0< 60.0 | 52.8.060.0 |
| thunderbird | < 52.8.0 | 52.8.0 |
| thunderbird esr | < 52.8.0 | 52.8.0 |
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.
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