Firefox Mobile iOS Address Bar Spoof Using Server-Side Redirect to non-http Scheme

published 2025-03-04 20 mo ago modified 2026-10-05 34 d ago also EUVD-2025-7772

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

Websites redirecting to a non-HTTP scheme URL could allow a website address to be spoofed for a malicious page. This vulnerability was fixed in Firefox for iOS 136.

Patch / fix

fixed in 1

mozilla firefox 136

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-03-04)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

Mozilla Firefox for iOS

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

mozilla.org /security/advisories/mfsa2025-13/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1945392
issue-tracking

Sources

CVE List CVE-2025-27424
NVD CVE-2025-27424

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary