CVE-2025-4085

HIGH

Firefox < 138.0 and Thunderbird < 138.0 - Privilege Escalation via UITour Actor

Title source: llm
STIX 2.1

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 was fixed in Firefox 138 and Thunderbird 138.

References (3)

Core 3

Scores

CVSS v3 7.1
EPSS 0.0019
EPSS Percentile 40.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-269
Status published
Products (4)
mozilla/firefox < 138.0
Mozilla/Firefox 138
mozilla/thunderbird < 138.0
Mozilla/Thunderbird 138
Published Apr 29, 2025
Tracked Since Feb 18, 2026