Bluegrams YoutubeDLSharp up to 1.1.1 on Windows command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Bluegrams YoutubeDLSharp up to 1.1.1 on Windows. The impacted element is an unknown function. Such manipulation leads to command injection. This vulnerability is traded as CVE-2025-43858. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Bluegrams YoutubeDLSharp up to 1.1.1 on Windows and classified as critical. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-43858 since 04/17/2025. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 1.1.2 eliminates this vulnerability. Applying the patch b6051372bd5af30f95f73de47d9bc71c3a07de0f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Social Network Software

Vendor

• Bluegrams

Name

• YoutubeDLSharp

Version

• 1.1.0
• 1.1.1

License

• open-source

Website

• Product: https://github.com/Bluegrams/YoutubeDLSharp/

CPE 2.3info

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CPE 2.2info

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