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If the "app.support.baseURL" preference is changed by a malicious local program to contain HTML and script content, this content is not sanitized. It will be executed if a user loads "chrome://browser/content/preferences/in-content/preferences.xul" directly in a tab and executes a search. This stored preference is also executed whenever an EME video player plugin displays a CDM-disabled message as a notification message. This vulnerability affects Firefox < 59.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade waterfoxUpgrade firefoxUpgrade firefox-esrUpgrade linux-thunderbirdUpgrade seamonkeyUpgrade thunderbirdUpgrade libxulUpgrade linux-seamonkeyUpgrade linux-firefox | Dec 10, 2025 | Mar 13, 2018 |
| Mfsa2018 06 | — | Upgrade to Mozilla Firefox version 59.0Upgrade to the latest version of Mozilla Firefox | Jul 12, 2018 | Jun 11, 2018 |
| Suse | — | Upgrade MozillaFirefox-translations-commonUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-other | May 22, 2018 | Mar 14, 2018 |
| Ubuntu | — | Upgrade firefox | Apr 26, 2018 | Mar 14, 2018 |
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