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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2025-4083

Process isolation bypass using "javascript:" URI links in cross-origin frames

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Status
Published
Published
Updated
Assigning organization
mozilla

Description

A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 115.23 to ≤ 115.*unaffected
  • 128.10 to ≤ 128.*unaffected
  • 138 to ≤ *unaffected

Mozilla Thunderbird

  • 128.10 to ≤ 128.*unaffected
  • 138 to ≤ *unaffected

References