Origin spoofing via accepted JavaScript links
Published Sep 3, 2024 · Updated Mar 19, 2025
Address-bar spoofing in Mozilla Firefox Focus for iOS before 130 allows remote attackers to display a false origin via a JavaScript link. The navigation handler accepts a clicked javascript URI, then renders only attacker-chosen content in the Focus navigation bar instead of the actual script URI. A user must tap the crafted page element; the trusted-looking domain can conceal the page's true origin and support phishing.
Summary
What happened
Address-bar spoofing in Mozilla Firefox Focus for iOS before 130 allows remote attackers to display a false origin via a JavaScript link. The navigation handler accepts a clicked javascript URI, then renders only attacker-chosen content in the Focus navigation bar instead of the actual script URI. A user must tap the crafted page element; the trusted-looking domain can conceal the page's true origin and support phishing.
The record
- CVE
- CVE-2024-8399
- Published
- Sep 3, 2024
- Updated
- Mar 19, 2025
- Vendor
- Mozilla
- Product
- Firefox Focus
- Classifications
- CWE-290, T1036
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2024CVE publishedPublication date reported by the CVE source.
- Mar 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <130
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Mozilla Bugzilla address-bar spoofing testcaseproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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