CVE-2025-55030

MEDIUM

Firefox for iOS < 142 - Cross-Site Scripting via Content-Disposition Header Bypass

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1976304

Scores

CVSS v3 6.1
EPSS 0.0015
EPSS Percentile 4.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-640
Status published
Products (2)
mozilla/firefox < 142.0
Mozilla/Firefox for iOS 142
Published Aug 19, 2025
Tracked Since Feb 18, 2026