CVE-2024-26283 Cross-site scripting in Firefox for iOS

What is CVE-2024-26283?

CVE-2024-26283 is a high-severity cross-site scripting vulnerability in Mozilla Firefox, published on 22 Feb 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

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. This vulnerability affects Firefox for iOS < 123.

Weakness: CWE-83

Which versions are affected by CVE-2024-26283?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2024-26283?

No fix has been published for CVE-2024-26283 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2024-26283 being exploited?

There is no known exploitation of CVE-2024-26283 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

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

Also known as GHSA-37wm-h7xg-q6w9.