CVE-2025-4087

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

29/04/2025

Last modified:

13/04/2026

Description

A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

4.80

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox:::::esr:::*		128.10 (excluding)
cpe:2.3:a:mozilla:firefox:::::-:::*		138.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::esr:::*		128.10.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::-:::*		138.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-4087

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools