CVE-2025-55028

MEDIUM

Firefox < 142.0 - Denial of Service via Repetitive JavaScript Alerts

Title source: llm
STIX 2.1

Description

Malicious scripts utilizing repetitive JavaScript alerts could prevent client user interaction in some scenarios and allow for denial of service attacks. This vulnerability was fixed in Firefox for iOS 142.

References (2)

Core 2
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1850240

Scores

CVSS v3 6.5
EPSS 0.0007
EPSS Percentile 21.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (2)
mozilla/firefox < 142.0
Mozilla/Firefox for iOS 142
Published Aug 19, 2025
Tracked Since Feb 18, 2026