What is CVE-2024-4773?

CVE-2024-4773 is a high-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 7.5/10. Published 2024-05-14.

How severe is CVE-2024-4773?

High severity. CVSS v3 base score is 7.5 out of 10.

Open Redirect in Mozilla Firefox

CVE-2024-4773

When a network error occurred during page load, the prior content could have remained in view with a blank URL bar. This could have been used to obfuscate a spoofed web site. This vulnerability affects Firefox < 126.

Vulnerability class: Open Redirect

Published 2024-05-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Mozilla Firefox — versions unspecified

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/mfsa2024-21/ (Vendor Advisory)

Frequently asked questions

What is CVE-2024-4773?: CVE-2024-4773 is a high-severity vulnerability in Mozilla Firefox, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 7.5/10. Published 2024-05-14.
How severe is CVE-2024-4773?: High severity. CVSS v3 base score is 7.5 out of 10.