CVE-2025-6428: Vulnerability in Mozilla Firefox
When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.
AI Analysis
Technical Summary
CVE-2025-6428 is an open redirect vulnerability affecting Firefox for Android. When a URL is supplied in a link's querystring parameter, Firefox for Android incorrectly follows that URL rather than the correct one, which could be exploited for phishing attacks. This vulnerability is limited to Firefox for Android and was addressed in Firefox 140. The CVSS 3.1 base score is 4.3, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and limited impact on integrity only.
Potential Impact
The vulnerability allows an attacker to craft a link that, when opened in Firefox for Android, causes the browser to follow a malicious URL instead of the legitimate one. This behavior could facilitate phishing attacks by misleading users about the destination of a link. There is no impact on confidentiality or availability, and no known exploitation in the wild has been reported.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox for Android version 140. Users and administrators should update Firefox for Android to version 140 or later to remediate this issue. No additional mitigation steps are required once the update is applied.
CVE-2025-6428: Vulnerability in Mozilla Firefox
Description
When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-6428 is an open redirect vulnerability affecting Firefox for Android. When a URL is supplied in a link's querystring parameter, Firefox for Android incorrectly follows that URL rather than the correct one, which could be exploited for phishing attacks. This vulnerability is limited to Firefox for Android and was addressed in Firefox 140. The CVSS 3.1 base score is 4.3, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and limited impact on integrity only.
Potential Impact
The vulnerability allows an attacker to craft a link that, when opened in Firefox for Android, causes the browser to follow a malicious URL instead of the legitimate one. This behavior could facilitate phishing attacks by misleading users about the destination of a link. There is no impact on confidentiality or availability, and no known exploitation in the wild has been reported.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox for Android version 140. Users and administrators should update Firefox for Android to version 140 or later to remediate this issue. No additional mitigation steps are required once the update is applied.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-06-20T14:51:33.064Z
- State
- PUBLISHED
Threat ID: 685aa0274dc24046c1dc5aa0
Added to database: 06/24/2025, 12:55:03 UTC
Last enriched: 04/14/2026, 11:51:49 UTC
Last updated: 09/10/2026, 19:24:57 UTC
Views: 188
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