Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-5269
CVE-2025-5269:
Mozilla Firefox ESR vulnerability analysis and mitigation
Overview
CVE-2025-5269 is a memory safety vulnerability discovered in Firefox ESR 128.10 and Thunderbird 128.10. The vulnerability was reported by Randell Jesup and was disclosed on May 27, 2025. This security flaw affects Firefox ESR versions prior to 128.11 (Mozilla Advisory, NVD).
Technical details
The vulnerability is classified as a memory safety bug that shows evidence of memory corruption. It has been assigned a CVSS v3.1 Base Score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. The weakness is categorized as CWE-787 (Out-of-bounds Write) (NVD).
Impact
The vulnerability could potentially be exploited to run arbitrary code if sufficient effort was applied. The impact is rated as moderate, affecting both the confidentiality and integrity of the system (Mozilla Advisory).
Mitigation and workarounds
The vulnerability has been fixed in Firefox ESR 128.11 and Thunderbird 128.11. Users are advised to update their software to these latest versions to mitigate the risk (Mozilla Advisory).
Additional resources
Source: This report was generated using AI
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