If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for other JavaScript code. If the parent process then runs this replaced code, the executed script would be run with the parent process' privileges, escaping the sandbox on content processes. This vulnerability affects Firefox < 60.
CVSS Details
- CVSS 3.1 Base Score: 8.1
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Freebsd | — | Upgrade firefox-esrUpgrade linux-seamonkeyUpgrade linux-thunderbirdUpgrade firefoxUpgrade waterfoxUpgrade thunderbirdUpgrade libxulUpgrade seamonkeyUpgrade linux-firefox | May 10, 2018 | May 9, 2018 |
| Mfsa2018 11 | — | Upgrade to Mozilla Firefox version 60.0 | May 10, 2018 | May 9, 2018 |
| Suse | — | Upgrade mozillafirefoxUpgrade mozillafirefox-translations-commonUpgrade mozillafirefox-translations-otherUpgrade mozillafirefox-devel | May 20, 2018 | May 9, 2018 |
| Ubuntu | — | Upgrade firefox | May 22, 2018 | May 9, 2018 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub