CVE-2025-43858 CRITICAL

CVE-2025-43858: YoutubeDLSharp allows command injection on windows system due to non sanitized arguments

Vendor Bluegrams
Product YoutubeDLSharp
Weakness CWE-77
Published April 24, 2025
Last update April 24, 2025

CVSS base score

9.2/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

YoutubeDLSharp is a wrapper for the command-line video downloaders youtube-dl and yt-dlp. In versions starting from 1.0.0-beta4 and prior to 1.1.2, an unsafe conversion of arguments allows the injection of a malicious commands when starting `yt-dlp` from a commands prompt running on Windows OS with the `UseWindowsEncodingWorkaround` value defined to true (default behavior). If a user is using built-in methods from the YoutubeDL.cs file, the value is true by default and a user cannot disable it from these methods. This issue has been patched in version 1.1.2.

Key dates

02Disclosure timeline

April 24, 2025 CVE published
April 24, 2025 Record updated