PT-2025-18155 · Mozilla+1 · Thunderbird+2

Hafiizh · Published 2025-04-29 · Updated 2025-11-19 · CVE-2025-4086

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Firefox for Android versions prior to 138 Thunderbird versions prior to 138

Description 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 issue affects Firefox for Android and Thunderbird.

Recommendations For Firefox for Android versions prior to 138, update to version 138 or later to resolve the issue. For Thunderbird versions prior to 138, update to version 138 or later to resolve the issue.

Fix

UI Misrepresentation of Critical Information

Weakness Enumeration

CWE-451

Related Identifiers

ALT-PU-2025-11100

ALT-PU-2025-14599

ALT-PU-2025-6353

ALT-PU-2025-6478

ALT-PU-2025-7695

ALT-PU-2025-7697

CVE-2025-4086

OPENSUSE-SU-2025:15045-1

Affected Products

Alt Linux

Firefox For Android

Thunderbird

References · 25

• https://mozilla.org/security/advisories/mfsa2025-31 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2025-28/#CVE-2025-4086 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-4086 · Security Note
• https://osv.dev/vulnerability/CVE-2025-4086 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-4086 · Security Note
• https://ubuntu.com/security/CVE-2025-4086 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2025-28 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15045-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-4086 · Vendor Advisory
• https://suse.com/security/cve/CVE-2025-4085 · Note
• https://suse.com/security/cve/CVE-2025-4087 · Note
• https://suse.com/security/cve/CVE-2025-4092 · Note
• https://suse.com/security/cve/CVE-2025-4088 · Note
• https://suse.com/security/cve/CVE-2025-4091 · Note
• https://t.me/cvedetector/23996 · Telegram Post