CVE-2020-35112

Mozilla: Opening an extension-less download may have inadvertently launched an executable instead

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Severity

Low

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · December 15, 2020

Updated · November 22, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as:

If a user downloaded a file lacking an extension on Windows, and then "Open"-ed it from the downloads panel, if there was an executable file in the downloads directory with the same name but with an executable extension (such as .bat or .exe) that executable would have been launched instead.

Note: This issue only affected Windows operating systems. Other operating systems are unaffected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE not specified