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CVE-2025-4087

Date: April 29, 2025

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 affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.

Severity Score

Related Resources (7)

https://www.mozilla.org/security/advisories/mfsa2025-29/
https://nvd.nist.gov/vuln/detail/CVE-2025-4087
https://www.mozilla.org/security/advisories/mfsa2025-28/
https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
https://www.mozilla.org/security/advisories/mfsa2025-32/
https://www.mozilla.org/security/advisories/mfsa2025-31/
https://www.mend.io/vulnerability-database/CVE-2025-4087

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

CVSS v3.1

Base Score:
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

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