CVE-2025-1939

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 affects Firefox < 136.

Category

3.9
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1928334 issue tracking
https://www.mozilla.org/security/advisories/mfsa2025-14/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-1939?
CVE-2025-1939 has been scored as a low severity vulnerability.
How to fix CVE-2025-1939?
To fix CVE-2025-1939, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-1939 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-1939 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-1939?
CVE-2025-1939 affects Mozilla Firefox.
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