StreamVault RCE via unsanitized yt-dlp args in SpiritApp
CVE-2025-66203 Published on December 26, 2025
StreamVault is Vulnerable to Authenticated Remote Code Execution (RCE) via ytdlpargs Configuration Injection
StreamVault is a video download integration solution. Prior to version 251126, a Remote Code Execution (RCE) vulnerability exists in the stream-vault application (SpiritApplication). The application allows administrators to configure yt-dlp arguments via the /admin/api/saveConfig endpoint without sufficient validation. These arguments are stored globally and subsequently used in YtDlpUtil.java when constructing the command line to execute yt-dlp. This issue has been patched in version 251126.
Vulnerability Analysis
CVE-2025-66203 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2025-66203 has been classified to as a Shell injection vulnerability or weakness.
Affected Versions
lemon8866 StreamVault Version < 251126 is affected by CVE-2025-66203Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.