CVE-2025-23109

MEDIUM 6.5

Address bar spoofing on iOS using long hostnames

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

Long hostnames in URLs could be leveraged to obscure the actual host of the website or spoof the website address. This vulnerability was fixed in Firefox for iOS 134.

Vendor	mozilla
Product	firefox for ios
Ecosystems	Browser JavaScript
Industries	Technology
Published	Jan 11, 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=1419275 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-06/

Credits

Khalil Zhani