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

Severity: low (CVSS 3.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-04 · updated 2026-10-05
Weakness: CWE-359

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.

Affected products

Mozilla Firefox: before 136.0 — fixed in 136.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 136.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1928334
https://www.mozilla.org/security/advisories/mfsa2025-14/
https://taptrap.click

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