CVE-2025-23109 — MEDIUM (6.5)

Q: What is CVE-2025-23109?

CVE-2025-23109 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.

Q: How severe is CVE-2025-23109?

CVE-2025-23109 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-23109?

Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Mozilla	Firefox	< 134.0

Related Weaknesses (CWE)

CWE-346

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1419275Issue TrackingPermissions Required
https://www.mozilla.org/security/advisories/mfsa2025-06/Vendor Advisory

FAQ

What is CVE-2025-23109?

CVE-2025-23109 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.

How severe is CVE-2025-23109?

CVE-2025-23109 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-23109?

Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.