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CVE-2025-5020: Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs...

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 affects Firefox for iOS < 139.

Classification

CVE ID: CVE-2025-5020

Problem Types

Links using non-HTTP schemes opened from other apps such as Safari could have allowed spoofing of website addresses

Affected Products

Vendor: Mozilla

Product: Firefox for iOS

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.03% (probability of being exploited)

EPSS Percentile: 7.57% (scored less or equal to compared to others)

EPSS Date: 2025-06-19 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-5020
https://bugzilla.mozilla.org/show_bug.cgi?id=1951558
https://www.mozilla.org/security/advisories/mfsa2025-39/

Timeline