CVE-2025-55028

JavaScript alerts could impede UI interaction or allow denial of service attacks

State: Published
Severity: 6.5 Medium
Published: Aug 19, 2025
Updated: Apr 13, 2026
Reserved: Aug 5, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
Firefox for iOSMozilla	142 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1850240
https://www.mozilla.org/security/advisories/mfsa2025-68/

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