Vulnerability Database

309,540

Total vulnerabilities in the database

CVE-2025-4086

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 affects Firefox < 138 and Thunderbird < 138.

  • Published: Apr 29, 2025
  • Updated: Nov 16, 2025
  • CVE: CVE-2025-4086
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWEs:

Software From Fixed in
mozilla / firefox - 138.0
mozilla / thunderbird - 138.0