CVE-2025-3033

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

State: Published
Severity: 7.7 High
Published: Apr 1, 2025
Updated: Apr 13, 2026
Reserved: Mar 31, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-73 External Control of File Name or Path

Affected Products

Product	Versions
FirefoxMozilla	137 and laterNot affected
ThunderbirdMozilla	137 and laterNot affected

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/

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