CVE-2025-14744: Filename spoofing via Unicode Right-to-Left Override in Firefox for iOS

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: 2025-12-18 · updated 2026-10-05
Weakness: CWE-451

Description

Unicode RTLO characters could allow malicious websites to spoof filenames in the downloads UI for Firefox for iOS, potentially tricking users into saving files of an unexpected file type. This vulnerability was fixed in Firefox for iOS 144.0.

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=1984683
https://www.mozilla.org/security/advisories/mfsa2025-97/

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