CVE-2025-4086CWE-451

CVE-2025-4086

Medium · published April 29, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
20.4
In the wild
Unconfirmed
What it is

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog.

*This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00290 · 20.4th percentile
Weakness
CWE-451 · User Interface (UI) Misrepresentation of Critical Information
Published
2025-04-29T18:15Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 138.0138.0
mozilla/thunderbird< 138.0138.0
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=1945705 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-28/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-31/ · [email protected]
EPSS history
Timeline
  • 29 APR 13:13Z
    Specially crafted filename could be used to obscure download type
    cvelistv5