CVE-2025-4085 – Firefox UITour Actor Privilege Escalation

The following table lists the changes that have been made to the
CVE-2025-4085 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. 29, 2025

    Action Type Old Value New Value
    Added Description An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges. This vulnerability affects Firefox < 138 and Thunderbird < 138.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1915280
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-28/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-31/
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