CVE-2025-55032: Focus incorrectly ignores Content-Disposition headers for some MIME types

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-19 · updated 2026-06-17
Weakness: CWE-601

Description

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

Affected products

Mozilla Focus for iOS: before 142.0 — fixed in 142.0

How to fix

Upgrade to a fixed version: Mozilla Focus for iOS 142.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1976296
https://www.mozilla.org/security/advisories/mfsa2025-69/

Get alerted when CVE-2025-55032 or the next vulnerability affects your stack