CVE-2025-23109

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

Weakness

The product does not properly verify that the source of data or communication is valid.

Affected Software

Name	Vendor	Start Version	End Version
Firefox	Mozilla	*	134.0 (excluding)

https://cwe.mitre.org/data/definitions/111.html
https://cwe.mitre.org/data/definitions/141.html
https://cwe.mitre.org/data/definitions/142.html
https://cwe.mitre.org/data/definitions/160.html
https://cwe.mitre.org/data/definitions/21.html
https://cwe.mitre.org/data/definitions/384.html
https://cwe.mitre.org/data/definitions/385.html
https://cwe.mitre.org/data/definitions/386.html
https://cwe.mitre.org/data/definitions/387.html
https://cwe.mitre.org/data/definitions/388.html
https://cwe.mitre.org/data/definitions/510.html
https://cwe.mitre.org/data/definitions/59.html
https://cwe.mitre.org/data/definitions/60.html
https://cwe.mitre.org/data/definitions/75.html
https://cwe.mitre.org/data/definitions/76.html
https://cwe.mitre.org/data/definitions/89.html

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1419275
https://www.mozilla.org/security/advisories/mfsa2025-06/

NVD	https://nvd.nist.gov/vuln/detail/CVE-2025-23109
CWE	https://cwe.mitre.org/data/definitions/346.html

Origin Validation Error

Weakness

Affected Software

Related Attack Patterns

References