CVE-2025-5020

MEDIUM

Firefox for iOS < 139 - URL Spoofing via Non-HTTP Scheme Handler

Title source: llm

Description

Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox iOS client. This vulnerability was fixed in Firefox for iOS 139.

References (2)

Core 2

Core References

Permissions Required

https://bugzilla.mozilla.org/show_bug.cgi?id=1951558

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-39/

Scores

CVSS v3 4.3

EPSS 0.0018

EPSS Percentile 39.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-939

Status published

Products (2)

mozilla/firefox < 139.0

Mozilla/Firefox for iOS 139

Published May 21, 2025

Tracked Since Feb 18, 2026