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Vulnerabilities

Security fix · CVE-2025-43858

YoutubeDLSharp is a wrapper for the command-line video downloaders youtube-dl and yt-dlp.

Published Apr 24, 2025 · catalog updated Apr 24, 2025 · Bluegrams YoutubeDLSharp

Check if you run it

No confirmed exploitation is on record for CVE-2025-43858. EPSS is 0.26%. Act only if a listed version of Bluegrams YoutubeDLSharp is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.26%
Remediation
Version ranges on file
Affected products
vendor Bluegrams YoutubeDLSharp 1.0.0-beta4, < 1.1.2

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 from a commands prompt running on Windows OS with the 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Bluegrams YoutubeDLSharp 1.0.0-beta4, < 1.1.21.0.0-beta4, < 1.1.2

How to fix CVE-2025-43858

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-43858. EPSS is 0.26%. Act only if a listed version of Bluegrams YoutubeDLSharp is installed.

Which versions are affected?

Compare what you have installed with Bluegrams YoutubeDLSharp 1.0.0-beta4, < 1.1.2 1.0.0-beta4, < 1.1.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 24, 2025 · EUVD

    Detected

    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 from a commands prompt running on Windows OS with the value defined to true (default behavior). If a user is using built-in methods from the YoutubeDL.cs file,

  2. Apr 24, 2025 · EUVD

    Updated

    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 from a commands prompt running on Windows OS with the value defined to true (default behavior). If a user is using built-in methods from the YoutubeDL.cs file,

Sources

  • CVE.orgVulnerability recordCVE-2025-43858

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-43858

    30-day exploitation probability 0.3%

    first.org
  • EUVDVulnerability recordEUVD-2025-11986

    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 from a commands prompt running on Windo

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.