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CVE-2025-3033 — After selecting a malicious Windows `.url` shortcut from the local filesystem, an unexpected file could be…

Mozilla · Firefox · Published 1 Apr 2025 · Modified 30 Sept 2026

Description

After selecting a malicious Windows `.url` shortcut from the local filesystem, an unexpected file could be uploaded. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

References

What to do
  1. Check whether Firefox is in your asset inventory.
  2. Patch in the next maintenance window; prioritise internet-facing systems.
  3. Record the decision in your risk register for audit evidence.
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Link: adminadda.com/cve/CVE-2025-3033