PT-2025-4131 · Mozilla+4 · Thunderbird+5

Irvan Kurniawan · Published 2025-02-04 · Updated 2026-02-02 · CVE-2025-1018

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

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

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

Description The issue arises when the fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential 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.

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:2025-02307

CVE-2025-1018

OPENSUSE-SU-2025:14730-1

USN-7263-1

USN-7991-1

Affected Products

Alt Linux

Astra Linux

Firefox

Linuxmint

Thunderbird

Ubuntu

References · 159

• https://ubuntu.com/security/CVE-2025-13015 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-1018 · Security Note
• 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://osv.dev/vulnerability/UBUNTU-CVE-2025-1018 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-0882 · Vendor Advisory