CVE-2025-11718: Address bar could be spoofed on Android using visibilitychange

Severity: medium (CVSS 6.5 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: 2025-10-14 · updated 2026-10-08
Weakness: CWE-451

Description

When the address bar was hidden due to scrolling on Android, a malicious page could create a fake address bar to fool the user in response to a visibilitychange event. This vulnerability was fixed in Firefox 144.

Affected products

Mozilla Firefox: before 144.0 — fixed in 144.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 144.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1980808
https://www.mozilla.org/security/advisories/mfsa2025-81/

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