CVE-2025-3859 – Focus URL Truncation Vulnerability

The following table lists the changes that have been made to the
CVE-2025-3859 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 30, 2025

    Action Type Old Value New Value
    Added 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 affects Focus < 138.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1951533
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-33/
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