What is CVE-2025-0244?

CVE-2025-0244 is a medium-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.3/10. Published 2025-01-07.

How severe is CVE-2025-0244?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Open Redirect in Mozilla Firefox

CVE-2025-0244

When redirecting to an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 134.

Vulnerability class: Open Redirect

Published 2025-01-07 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.065 (93.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.066 · newest: 0.065 · change: -0.001

Affected products

Mozilla Firefox — versions 134

Weakness classification (CWE)

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

References

bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
www.mozilla.org/security/advisories/mfsa2025-01/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-0244?: CVE-2025-0244 is a medium-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.3/10. Published 2025-01-07.
How severe is CVE-2025-0244?: Medium severity. CVSS v3 base score is 5.3 out of 10.