CVE-2025-1939 Tapjacking in Android Custom Tabs using transition animations

What is CVE-2025-1939?

CVE-2025-1939 is a low-severity vulnerability in Mozilla Firefox, published on 4 Mar 2025. 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

Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could have been used to trick a user into granting sensitive permissions by hiding what the user was actually clicking. This vulnerability was fixed in Firefox 136.

Weakness: CWE-359

Which versions are affected by CVE-2025-1939?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2025-1939?

Upgrade to a fixed version.

Is CVE-2025-1939 being exploited?

There is no known exploitation of CVE-2025-1939 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-x9h6-qwxm-528g.