CVE-2021-23956

MEDIUM

Firefox < 85.0 - Unintended Directory Upload via Ambiguous File Picker

Title source: llm

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.

References (2)

Core 2

Core References

Release Notes, Vendor Advisory x_refsource_misc

https://www.mozilla.org/security/advisories/mfsa2021-03/

Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc

https://bugzilla.mozilla.org/show_bug.cgi?id=1338637

Scores

CVSS v3 6.5

EPSS 0.0018

EPSS Percentile 38.9%

Attack Vector NETWORK

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

Details

Status published

Products (1)

mozilla/firefox < 85.0

Published Feb 26, 2021

Tracked Since Feb 18, 2026