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Vulnerability DatabaseCVE-2025-4091

CVE-2025-4091: 
Mozilla Firefox vulnerability analysis and mitigation

Overview

CVE-2025-4091 is a memory safety vulnerability affecting multiple Mozilla products including Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. The vulnerability was discovered by Maurice Dauer and the Mozilla Fuzzing Team and was disclosed on April 29, 2025 (Mozilla Advisory).

Technical details

The vulnerability is classified as a memory safety bug that shows evidence of memory corruption. It has been assigned a CVSS 3.1 Base Score of 6.5 (MEDIUM) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. The vulnerability is associated with CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer (CIS Advisory).

Impact

The vulnerability could potentially allow an attacker to execute arbitrary code on affected systems. With enough effort, the memory corruption issues could be exploited to compromise system security. The impact is considered moderate, affecting both confidentiality and integrity of the system (Mozilla Advisory).

Mitigation and workarounds

The vulnerability has been fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird ESR 128.10. Users are advised to update their software to these latest versions to mitigate the risk (NVD).

Additional resources

Source: This report was generated using AI

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