CVE-2025-55030

Content-Disposition headers incorrectly ignored for some MIME types

State: Published
Severity: 6.1 Medium
Published: Aug 19, 2025
Updated: Apr 13, 2026
Reserved: Aug 5, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.1 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-640 Weak Password Recovery Mechanism for Forgotten Password

Affected Products

Product	Versions
Firefox for iOSMozilla	142 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1976304
https://www.mozilla.org/security/advisories/mfsa2025-68/

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