Skyvern - RCE (CVE-2025-49619)
Description
Skyvern through 0.1.85 is vulnerable to server-side template injection (SSTI) in the Prompt field of workflow blocks such as the Navigation v2 Block. Improper sanitization of Jinja2 template input allows authenticated users to inject crafted expressions that are evaluated on the server, leading to blind remote code execution (RCE).
psychologyCrowdSec Analysis
CVE-2025-49619 is a server-side template injection (SSTI) vulnerability in Skyvern through version 0.1.85, affecting workflow blocks like the Navigation v2 Block. Due to improper sanitization of Jinja2 template input, authenticated users can inject malicious expressions into the Prompt field, resulting in blind remote code execution on the server. This flaw could allow attackers to execute arbitrary commands and potentially compromise sensitive data or system integrity.
CrowdSec has been tracking this vulnerability and its exploits since 17th of September 2025.
CrowdSec has not observed any significant exploitation activity targeting CVE-2025-49619 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.
Attackers exploit the Skyvern Workflow Editor by sending crafted POST requests to /api/v1/workflows with malicious Jinja2 template payloads in the prompt field, enabling remote code execution when the workflow is rendered. These attacks require a valid API key and typically target authenticated endpoints related to workflow creation and execution.
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| Event | Date |
|---|---|
| CVE Published | 2025-06-07 |
| Rule Released | 2025-09-17 |
| CrowdSec First Seen | 2025-12-27 |