CVE-2021-29993 Other in Firefox

What is CVE-2021-29993?

CVE-2021-29993 is a high-severity vulnerability in Mozilla Firefox Mobile, published on 3 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Firefox for Android allowed navigations through the `intent://` protocol, which could be used to cause crashes and UI spoofs. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92.

Which versions are affected by CVE-2021-29993?

It affects 1 product.

Products include Mozilla Firefox Mobile.

How do I fix CVE-2021-29993?

Upgrade to a fixed version.

Is CVE-2021-29993 being exploited?

There is no known exploitation of CVE-2021-29993 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox Mobile

• CVE-2026-84135 Other issue in Firefox Focus for Android Critical 9.8
• CVE-2024-43111 Cross-site scripting in Firefox for iOS Critical 9.8
• CVE-2023-49060 Information disclosure in Firefox for iOS Critical 9.8
• CVE-2026-92033 Privilege escalation in Firefox for Android High 8.8
• CVE-2026-84117 Privilege escalation in Firefox for Android High 8.8

All Mozilla Firefox Mobile vulnerabilities

Sources

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

Also known as GHSA-7926-phm6-wvh3.