CVE-2025-55030

MEDIUM 6.1

Content-Disposition headers incorrectly ignored for some MIME types

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	mozilla
Product	firefox for ios
Ecosystems	Browser JavaScript
Industries	Technology
Published	Aug 19, 2025
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Firefox for iOS

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Renwa