CVE-2024-1563 Race condition in Focus for iOS

What is CVE-2024-1563?

CVE-2024-1563 is a high-severity vulnerability in Mozilla Focus for iOS, published on 22 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-367

Which versions are affected by CVE-2024-1563?

It affects 1 product.

Products include Mozilla Firefox Focus.

How do I fix CVE-2024-1563?

No fix has been published for CVE-2024-1563 yet. Limit exposure of the affected software until one is available.

Is CVE-2024-1563 being exploited?

There is no known exploitation of CVE-2024-1563 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Focus for iOS

• CVE-2024-10474 Security feature bypass in Focus for iOS Critical 9.1
• CVE-2023-29534 Security feature bypass in Firefox for Android Critical 9.1
• CVE-2024-0605 Race condition in Focus for iOS High 7.5
• CVE-2023-25743 Security feature bypass in Firefox High 7.5
• CVE-2025-10290 Other in Focus for iOS Medium 6.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-783m-f4c2-pgqr.