7.5HIGH

CVE-2025-55029 — Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of…

Mozilla · Firefox · Published 19 Aug 2025 · Modified 30 Sept 2026

Description

Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks. This vulnerability was fixed in Firefox for iOS 142.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1973577
https://www.mozilla.org/security/advisories/mfsa2025-68/

What to do

Check whether Firefox is in your asset inventory.
Patch in the next maintenance window; prioritise internet-facing systems.
Record the decision in your risk register for audit evidence.

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Link: adminadda.com/cve/CVE-2025-55029