CVE-2025-8041
📋 TL;DR
Firefox for Android displayed URLs incorrectly by truncating from the end instead of showing the origin first, potentially hiding malicious domains. This affects Firefox for Android versions before 141. Users could be tricked into visiting phishing sites due to misleading URL display.
💻 Affected Systems
- Firefox for Android
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Users visit malicious phishing sites believing they're legitimate, leading to credential theft, malware installation, or financial fraud.
Likely Case
Users accidentally visit phishing sites due to misleading URL display, potentially exposing sensitive information.
If Mitigated
Users notice the truncated URL and verify the full address before proceeding, preventing successful phishing.
🎯 Exploit Status
Exploitation requires user interaction (clicking a link) and convincing social engineering to hide malicious domains in truncated URLs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firefox for Android 141
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2025-56/
Restart Required: No
Instructions:
1. Open Google Play Store 2. Search for Firefox 3. Tap Update if available 4. Alternatively, enable auto-updates in Play Store settings
🔧 Temporary Workarounds
Manual URL Verification
androidAlways tap and hold URLs to see full address before clicking
Use Alternative Browser
androidTemporarily use Chrome or other browsers until Firefox is updated
🧯 If You Can't Patch
- Train users to always verify full URLs before clicking links
- Implement web filtering to block known phishing domains
🔍 How to Verify
Check if Vulnerable:
Open Firefox for Android > Settings > About Firefox. If version is less than 141, you are vulnerable.Check Version:
Open Firefox > Settings > About FirefoxVerify Fix Applied:
After updating, test by visiting a long URL and verify the origin is displayed first in the address bar.📡 Detection & Monitoring
Log Indicators:
- Unusual user reports of suspicious URLs or phishing attempts
Network Indicators:
- Increased traffic to known phishing domains from Firefox Android clients
SIEM Query:
Search for user reports containing 'firefox android url display' or 'phishing attempt'