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The default webcal: protocol handler will load a web site vulnerable to cross-site scripting (XSS) attacks. This default was left in place as a legacy feature and has now been removed. *Note: this issue only affects users with an account on the vulnerable service. Other users are unaffected.*. This vulnerability affects Firefox < 67.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jul 23, 2019 |
| Freebsd | — | Upgrade firefox-esrUpgrade waterfoxUpgrade firefoxUpgrade linux-thunderbirdUpgrade libxulUpgrade seamonkeyUpgrade thunderbirdUpgrade linux-firefoxUpgrade linux-seamonkey | May 23, 2019 | May 22, 2019 |
| Mfsa2019 13 | — | Upgrade to Mozilla Firefox version 67.0Upgrade to the latest version of Mozilla Firefox | May 22, 2019 | May 21, 2019 |
| Ubuntu | — | Upgrade firefox | May 22, 2019 | May 21, 2019 |
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