CVE-2025-23109
MEDIUMCVSS 6.5/10EPSS 0.18%
Last modified
CVE-2025-23109 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 134.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1419275Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-06/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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 was fixed in Firefox for iOS 134.
How severe is CVE-2025-23109?
CVE-2025-23109 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2025-23109?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
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Are you affected by CVE-2025-23109?
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Scan your code nowSource: NVD / NIST