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When a new protocol handler is registered, the API accepts a title argument which can be used to mislead users about which domain is registering the new protocol. This may result in the user approving a protocol handler that they otherwise would not have. This vulnerability affects Firefox < 63.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Feb 28, 2019 |
| Freebsd | — | Upgrade libxulUpgrade seamonkeyUpgrade firefoxUpgrade thunderbirdUpgrade firefox-esrUpgrade linux-seamonkeyUpgrade linux-thunderbirdUpgrade waterfoxUpgrade linux-firefox | Oct 24, 2018 | Oct 23, 2018 |
| Mfsa2018 26 | — | Upgrade to Mozilla Firefox version 63.0Upgrade to the latest version of Mozilla Firefox | Oct 24, 2018 | Oct 23, 2018 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 28, 2019 |
| Ubuntu | — | Upgrade firefox | Nov 7, 2018 | Oct 23, 2018 |
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