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The importScripts function in the Web Workers API implementation in Mozilla Firefox before 43.0 allows remote attackers to bypass the Same Origin Policy by triggering use of the no-cors mode in the fetch API to attempt resource access that throws an exception, leading to information disclosure after a rethrow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade libxulUpgrade linux-firefoxUpgrade seamonkeyUpgrade firefoxUpgrade thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade linux-thunderbird | Dec 10, 2025 | Dec 15, 2015 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird. | Oct 30, 2017 | Dec 16, 2015 |
| Mfsa2015 140 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 43.0 | Dec 18, 2015 | Dec 16, 2015 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox | Jan 4, 2016 | Dec 16, 2015 |
| Ubuntu | — | Upgrade firefox | Dec 18, 2015 | Dec 15, 2015 |
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