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MEDIUM · 6.1

CVE-2025-3859

Websites directing users to long URLs that caused eliding to occur in the location view could leverage the truncating behavior to potentially trick users into thinking they were on a different webpage...

Vulnerability Description

Websites directing users to long URLs that caused eliding to occur in the location view could leverage the truncating behavior to potentially trick users into thinking they were on a different webpage. This vulnerability was fixed in Focus 138.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
MozillaFirefox Focus< 138.0

Related Weaknesses (CWE)

CWE-601CWE-451

References

FAQ

What is CVE-2025-3859?

CVE-2025-3859 is a vulnerability with a CVSS score of 6.1 (MEDIUM). Websites directing users to long URLs that caused eliding to occur in the location view could leverage the truncating behavior to potentially trick users into thinking they were on a different webpage...

How severe is CVE-2025-3859?

CVE-2025-3859 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-3859?

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