CVE-2025-55029

Name: CVE-2025-55029
Creator: NVD / NIST
Published: 2025-08-19T21:15:28.09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2025-55029 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.32%

23.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 142.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1973577Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-68/Vendor Advisory

Timeline

Published: Aug 19, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-55029?

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.

How severe is CVE-2025-55029?

CVE-2025-55029 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55029?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-55029?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST