The internal WebBrowserPersist code does not use correct origin context for a resource being saved. This manifests when sub-resources are loaded as part of "Save Page As..." functionality. For example, a malicious page could recover a visitor's Windows username and NTLM hash by including resources otherwise unreachable to the malicious page, if they can convince the visitor to save the complete web page. Similarly, SameSite cookies are sent on cross-origin requests when the "Save Page As..." menu item is selected to save a page, which can result in saving the wrong version of resources based on those cookies. This vulnerability affects Firefox < 63.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
Covered by Rapid7
| 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 linux-firefoxUpgrade seamonkeyUpgrade libxulUpgrade firefoxUpgrade waterfoxUpgrade thunderbirdUpgrade linux-thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esr | Oct 24, 2018 | Oct 23, 2018 |
| Mfsa2018 26 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 63.0 | 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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