Scanning a malicious URL utilizing Firefox's open-text scheme with the QR code scanner could load arbitrary websites

published 2025-08-19 14 mo ago modified 2026-10-05 34 d ago also EUVD-2025-25228

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

The QR scanner could allow arbitrary websites to be opened if a user was tricked into scanning a malicious link that leveraged Firefox's open-text URL scheme. This vulnerability was fixed in Firefox for iOS 141.

Patch / fix

fixed in 1

mozilla firefox 141

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 14 mo ago (2025-08-20)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Mozilla Firefox for iOS

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

mozilla.org /security/advisories/mfsa2025-60/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1946122
issue-tracking, permissions-required

Sources

CVE List CVE-2025-54145
NVD CVE-2025-54145

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