URL Spoofing Vulnerability in Firefox for iOS by Mozilla
CVE-2025-5020

4.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox For iOS
Vendor
CVE Published:
21 May 2025

What is CVE-2025-5020?

A URL spoofing vulnerability in Firefox for iOS allows attackers to exploit maliciously crafted URLs opened from other applications, like Safari. This could lead to the misleading presentation of website addresses, potentially deceiving users about the legitimacy of the site they are accessing. The issue primarily arises from non-HTTP schemes used internally by the Firefox iOS client, affecting versions prior to 139.

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Deploy the Patch

Affected Version(s)

Firefox for iOS < 139

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1951558
https://www.mozilla.org/security/advisories/mfsa2025-39/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

James Lee
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