CVE-2025-54144: Internal Firefox open-text URL scheme allowed loading of arbitrary URLs

Severity: medium (CVSS 5.4 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: 2025-08-19 · updated 2026-10-05
Weakness: CWE-601

Description

The URL scheme used by Firefox to facilitate searching of text queries could incorrectly allow attackers to open arbitrary website URLs or internal pages if a user was tricked into clicking a link. This vulnerability was fixed in Firefox for iOS 141.

Affected products

Mozilla Firefox: before 141.0 — fixed in 141.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 141.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1946062
https://www.mozilla.org/security/advisories/mfsa2025-60/

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