PT-2025-4132 · Mozilla+4 · Thunderbird+5

Irvan Kurniawan · Published 2025-02-04 · Updated 2026-02-02 · CVE-2025-1019

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 135 Thunderbird versions prior to 135

Description The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack.

Recommendations For Firefox versions prior to 135, update to version 135 or later to resolve the issue. For Thunderbird versions prior to 135, update to version 135 or later to resolve the issue. As a temporary workaround, consider restricting access to fullscreen mode until a patch is available.

Fix

Clickjacking

Weakness Enumeration

CWE-1021

Related Identifiers

ALT-PU-2025-11100

ALT-PU-2025-14599

ALT-PU-2025-3108

ALT-PU-2025-7697

BDU:2025-12473

CVE-2025-1019

OPENSUSE-SU-2025:14730-1

USN-7263-1

USN-7991-1

Affected Products

Alt Linux

Astra Linux

Firefox

Linuxmint

Thunderbird

Ubuntu

References · 158

• https://ubuntu.com/security/CVE-2025-13015 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0887 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-11711 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0891 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-14328 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-8039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-11715 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-8038 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-1014 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-6434 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-0243 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-6435 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-1020 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0882 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-1019 · Vendor Advisory