User Interface (UI) Misrepresentation of Critical Information Affecting Firefox package, versions [,138.0b1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-FIREFOX-10231803
- published23 May 2025
- disclosed29 Apr 2025
- creditHafiizh
Introduced: 29 Apr 2025
CVE-2025-4086 (opens in a new tab)How to fix?
Upgrade Firefox to version 138.0b1 or higher.
Overview
Affected versions of this package are vulnerable to User Interface (UI) Misrepresentation of Critical Information due to the handling of specially crafted filenames. An attacker can obscure the type of downloaded files by encoding a large number of newline characters, potentially leading to the execution of unintended file types.
Note:
This only affects users of Firefox/Thunderbird for Android