CVE-2025-5264: 
NixOS vulnerability analysis and mitigation

CVE-2025-5264 is a moderate severity vulnerability discovered in Mozilla Firefox's "Copy as cURL" feature, reported by Ameen Basha M K and disclosed on May 27, 2025. The vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. The issue stems from insufficient escaping of newline characters in the "Copy as cURL" feature (Mozilla Advisory, NVD).

The vulnerability has been classified under CWE-77 (Improper Neutralization of Special Elements used in a Command Injection). It received a CVSS 3.1 base score of 4.8 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L, indicating local access requirements and moderate potential impact (NVD, Wiz).

If successfully exploited, this vulnerability could lead to local code execution on the user's system. An attacker could craft malicious commands that, when copied and executed using the "Copy as cURL" feature, would execute unauthorized code on the user's machine (Mozilla Advisory, Wiz).

The vulnerability has been fixed in Firefox 139, Firefox ESR 115.24, and Firefox ESR 128.11. Users are strongly advised to update their browsers to these versions or later to protect against this vulnerability (Mozilla Advisory).