by Kastro
Paper/Archive/CVE-2025-43858

CVE-2025-43858

Bluegrams YoutubeDLSharp — YoutubeDLSharp allows command injection on windows system due to non sanitized arguments

EPSS 0.3%public exploitCVSS 9.2
critical.is priorityof 100
41
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 18.4.184 × 203.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
YoutubeDLSharp>= 1.0.0-beta4, < 1.1.2–CNA

Scores by source

GitHub_M (CNA)9.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/Bluegrams/YoutubeDLSharp/security/advisories/GHSA-2jh5-g5ch-43q5refgithub.com/Bluegrams/YoutubeDLSharp/commit/b6051372bd5af30f95f73de47d9bc71c3a07de0frefgithub.com/Bluegrams/YoutubeDLSharp/commit/fdf3256da18d0e2da4a2f33ad4a1b72ff8273a50