Listen to this Post
How the CVE Works:
CVE-2025-5020 is a URL spoofing vulnerability in Firefox for iOS (< v139). Attackers could craft malicious URLs with non-HTTP schemes (e.g., internal Firefox iOS protocols) and deliver them via apps like Safari. When opened, Firefox would process these URLs but fail to properly validate or display the correct address, enabling address bar spoofing. This could trick users into believing they are on a legitimate site while interacting with a malicious one. The issue stems from insufficient URL scheme handling in the Firefox iOS client.
DailyCVE Form:
Platform: Firefox for iOS
Version: < 139
Vulnerability: URL spoofing
Severity: Medium
Date: 06/13/2025
Prediction: Patch expected by 07/10/2025
What Undercode Say:
Analytics:
grep -r "internalURLSchemes" /Firefox/iOS/ curl -X GET "http://example.com/malicious_redirect"
How Exploit:
1. Attacker crafts `firefox-internal://fakebank.com/login`.
2. Victim clicks link from Safari.
3. Firefox renders spoofed address bar.
Protection from this CVE:
- Update to Firefox for iOS ≥ 139.
- Disable custom URL scheme handling.
Impact:
- Phishing attacks via address bar spoofing.
- User data theft risk.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
