CVE-2025-1019: Vulnerability in Mozilla Firefox
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
AI Analysis
Technical Summary
This vulnerability involves manipulation of the z-order of browser windows in Mozilla Firefox, causing the fullscreen notification to be hidden improperly. This could allow an attacker to spoof the fullscreen state, potentially misleading users. The issue was reported by Irvan Kurniawan and tracked under Bug 1940162. It was fixed in Firefox 135 and Thunderbird 135 as part of a security update addressing multiple vulnerabilities. The CVSS v3.1 score is 4.3 (medium), reflecting a network attack vector with low complexity, no privileges required, user interaction needed, and limited impact on integrity only.
Potential Impact
The vulnerability allows an attacker to manipulate the browser UI to hide the fullscreen notification, which could be used to spoof the user interface and potentially deceive users. There is no direct impact on confidentiality or availability. The risk is limited to integrity through UI spoofing. No exploits in the wild have been reported, and the issue is mitigated by the official fix in Firefox 135.
Mitigation Recommendations
This vulnerability has been fixed in Mozilla Firefox version 135 and Thunderbird 135. Users and administrators should update to these versions or later to remediate the issue. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official update.
CVE-2025-1019: Vulnerability in Mozilla Firefox
Description
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves manipulation of the z-order of browser windows in Mozilla Firefox, causing the fullscreen notification to be hidden improperly. This could allow an attacker to spoof the fullscreen state, potentially misleading users. The issue was reported by Irvan Kurniawan and tracked under Bug 1940162. It was fixed in Firefox 135 and Thunderbird 135 as part of a security update addressing multiple vulnerabilities. The CVSS v3.1 score is 4.3 (medium), reflecting a network attack vector with low complexity, no privileges required, user interaction needed, and limited impact on integrity only.
Potential Impact
The vulnerability allows an attacker to manipulate the browser UI to hide the fullscreen notification, which could be used to spoof the user interface and potentially deceive users. There is no direct impact on confidentiality or availability. The risk is limited to integrity through UI spoofing. No exploits in the wild have been reported, and the issue is mitigated by the official fix in Firefox 135.
Mitigation Recommendations
This vulnerability has been fixed in Mozilla Firefox version 135 and Thunderbird 135. Users and administrators should update to these versions or later to remediate the issue. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-02-04T07:26:45.552Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2025-07/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-11/","vendor":"Mozilla"}]
Threat ID: 69dd057382d89c981f016f9e
Added to database: 4/13/2026, 3:02:11 PM
Last enriched: 4/13/2026, 3:19:15 PM
Last updated: 4/14/2026, 5:31:36 AM
Views: 4
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