CVE-2025-55028: 
NixOS vulnerability analysis and mitigation

CVE-2025-55028 is a security vulnerability affecting Firefox for iOS versions prior to 142, discovered by Antoine Morin and disclosed on August 19, 2025. The vulnerability involves malicious scripts that utilize repetitive JavaScript alerts which could prevent client user interaction and potentially enable denial of service attacks (Mozilla Advisory).

The vulnerability has been assigned a CVSS v3.1 base score of 6.5 (Medium), with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The scoring indicates that the vulnerability can be exploited over the network, requires low attack complexity, needs no privileges, but does require user interaction. The impact is primarily on availability, with no direct effect on confidentiality or integrity (AttackerKB).

The primary impact of this vulnerability is on system availability. When exploited, the vulnerability can prevent users from interacting with the Firefox iOS application through the manipulation of JavaScript alerts, effectively creating a denial of service condition (Mozilla Advisory).

The primary mitigation for this vulnerability is to update Firefox for iOS to version 142 or later, which contains the security fix. Mozilla has released this update as part of their security advisory MFSA2025-68 (Mozilla Advisory).

The vulnerability has been classified as having a moderate impact by Mozilla in their security advisory. ASEC (AhnLab Security Emergency Response Center) has also acknowledged the vulnerability in their security update advisory, recommending users to update to the latest version (ASEC).