CVE-2025-4087

MediumCVSS 4.8/10Last modified Oct 5, 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.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-125

Affected software

No affected versions have been published.

Timeline

Published
Apr 29, 2025
Last modified
Oct 5, 2026
NVD status
Modified

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CVE-2025-4087: Medium severity, CVSS 4.8 | Vulnix