Buffer overflow in Firefox for Android and Mozilla Firefox - CVE-2025-13027
Published: November 11, 2025
Vulnerability identifier: #VU118270
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-13027
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Firefox for Android
Mozilla Firefox
Fedora
Mozilla Thunderbird
firefox
Mozilla Firefox
Fedora
Mozilla Thunderbird
firefox
How to mitigate CVE-2025-13027
Install updates from vendor's website.
Firefox for Android - update to 145.0
Mozilla Firefox - update to 145.0
Mozilla Thunderbird - update to 145.0
firefox - addressed in versions 145.0-2.fc41, 145.0-2.fc42, 145.0-2.fc43
Mozilla Firefox - update to 145.0
Mozilla Thunderbird - update to 145.0
firefox - addressed in versions 145.0-2.fc41, 145.0-2.fc42, 145.0-2.fc43