Spoofing attack in Firefox for iOS



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-5020
CWE-ID CWE-451
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Firefox for iOS
Mobile applications / Apps for mobile phones

Vendor Mozilla

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Spoofing attack

EUVDB-ID: #VU109621

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-5020

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of non-HTTP scheme links opened from other applications. A remote attacker can spoof the website address.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Firefox for iOS: before 139.0

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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