CVE-2025-55028

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

CVSS 6.5 MEDIUMEPSS 0.2%CWE-400

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

19 Aug 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

Mozilla · Firefox for iOS

References

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