CVE-2025-55030

Name: CVE-2025-55030
Creator: NVD / NIST
Published: 2025-08-19T21:15:28.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.15%

Last modified Jun 17, 2026

CVE-2025-55030 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

Description

Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.15%

4.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-640

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 142.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1976304Issue 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-2025-55030?

How severe is CVE-2025-55030?

CVE-2025-55030 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55030?

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-2025-55030?

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

Scan your code now

Source: NVD / NIST