CVE-2025-8041 in Firefox
Summary
by MITRE • 08/20/2025
In the address bar, Firefox for Android truncated the display of URLs from the end instead of prioritizing the origin. This vulnerability affects Firefox < 141.
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Analysis
by VulDB Data Team • 08/20/2025
This vulnerability in Firefox for Android represents a significant user interface design flaw that compromises URL visibility and security awareness for mobile users. The issue manifests in how the browser handles URL display in the address bar when the full URL exceeds the available screen space. Rather than implementing a standard truncation method that prioritizes the origin domain and critical path elements, Firefox for Android incorrectly truncates URLs from the end, potentially obscuring important security indicators and domain information that users rely on for safe navigation.
The technical implementation flaw stems from improper string handling and display logic within the browser's address bar component specifically designed for mobile platforms. This behavior creates a situation where users may not see the complete domain name or critical path elements of a URL, making it difficult to identify potentially malicious sites or distinguish between legitimate and fraudulent web addresses. The vulnerability affects all versions prior to Firefox 141, indicating a long-standing issue that could have exposed users to phishing attacks or other web-based threats where URL visibility is crucial for security decision-making.
From an operational impact perspective, this vulnerability significantly weakens the browser's security posture for mobile users who rely on visual cues to assess website legitimacy. Users may be misled into trusting sites that appear to have familiar domains but actually contain malicious subdomains or path components that get truncated from the display. This issue particularly affects security-conscious users who depend on URL inspection for verifying site authenticity, and it creates potential attack vectors where malicious actors could exploit the truncated display to make deceptive websites appear more legitimate than they actually are.
The vulnerability aligns with CWE-200, which addresses improper handling of information exposure, and could be categorized under ATT&CK technique T1566 for social engineering through deceptive web content. Security researchers have noted that mobile browsers face unique challenges in balancing screen real estate with security visibility, and this implementation fails to properly address the fundamental requirement that users must be able to quickly identify and verify the origin of web addresses. The issue represents a failure in the principle of least privilege and user awareness, as users cannot properly evaluate the security context of the websites they are visiting. Organizations using Firefox for Android should prioritize immediate updates to version 141 or later to ensure proper URL display behavior and maintain user security awareness. The fix likely involves implementing proper URL truncation algorithms that prioritize origin information and maintain security-relevant path components while ensuring adequate display space for user interaction.