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CVE-2025-55028

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

Published: Aug 19, 2025Updated: Apr 13, 2026 Sources: CVE List NVD BDUCWE-400
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.2%
Top 89.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-400

Affected Products

Firefox for iOSMozilla
On-premDesktop App
Consumer Software / browser
FirefoxMozilla Corp.
On-premDesktop App
Consumer Software / browser
firefoxmozilla
On-premDesktop App
Consumer Software / browser
mozillaoss-projectUSConsumer Softwareaka mozilla corp.
mozilla corp.oss-projectUSConsumer Software

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

Timeline

Published
Aug 19, 2025
Last Updated
Apr 13, 2026

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