Advisory Published
CVE Published
Updated

CVE-2025-3859

First published: Mon Apr 21 2025(Updated: )

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

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Focus<138
Mozilla Focus<138
138

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Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2025-3859?

    CVE-2025-3859 has been classified with a medium severity rating.

  • How do I fix CVE-2025-3859?

    To mitigate CVE-2025-3859, users should upgrade to Focus version 138 or later.

  • What impact does CVE-2025-3859 have on users?

    CVE-2025-3859 could potentially mislead users by truncating long URLs, leading to a misconception of their webpage location.

  • Which software versions are affected by CVE-2025-3859?

    CVE-2025-3859 affects Focus versions prior to 138.

  • Is there a workaround for CVE-2025-3859 before updating?

    There are no specific workarounds for CVE-2025-3859, so updating is recommended to mitigate the risk.

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