CVE-2025-3033

Opening local .url files could lead to another file being opened

CVSS 7.7 HIGHEPSS 0.2%CWE-73

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Mozilla · Firefox Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1950056 https://www.mozilla.org/security/advisories/mfsa2025-20/https://www.mozilla.org/security/advisories/mfsa2025-23/