What is CVE-2025-54144?

CVE-2025-54144 is a medium-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2025-08-19.

How severe is CVE-2025-54144?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Open Redirect in Mozilla Firefox

CVE-2025-54144

The URL scheme used by Firefox to facilitate searching of text queries could incorrectly allow attackers to open arbitrary website URLs or internal pages if a user was tricked into clicking a link. This vulnerability was fixed in Firefox for iOS 141.

Vulnerability class: Open Redirect

Published 2025-08-19 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Mozilla Firefox
Mozilla Firefox For iOS — versions 141

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
www.mozilla.org/security/advisories/mfsa2025-60/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-54144?: CVE-2025-54144 is a medium-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2025-08-19.
How severe is CVE-2025-54144?: Medium severity. CVSS v3 base score is 5.4 out of 10.