CVE-2024-1563

Name: CVE-2024-1563
Creator: NVD / NIST
Published: 2024-02-22T15:15:08.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2024-1563 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. An attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom Firefox scheme and a timeout race condition. This vulnerability affects Focus for iOS < 122.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

An attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom Firefox scheme and a timeout race condition. This vulnerability affects Focus for iOS < 122.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.39%

30.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox Focus	< 122.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1863831Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2024-09/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1863831Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2024-09/Vendor Advisory

Timeline

Published: Feb 22, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-1563?

How severe is CVE-2024-1563?

CVE-2024-1563 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2024-1563?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-1563?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST