CVE-2021-23956

PoC —

CVSS 3.1

6.5 medium

EPSS

<1%p61

Published

Feb 26, 2021 (Feb 26, 2021)

Modified

Jun 17, 2026

Description

An ambiguous file picker design could have confused users who intended to select and upload a single file into uploading a whole directory. This was addressed by adding a new prompt. This vulnerability affects Firefox < 85.

Vendors: mozilla
Products: firefox
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.0%)

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