CVE-2020-37007: Liman 0.7 CSRF Vulnerability

CVE-2020-37007 Overview

CVE-2020-37007 is a Cross-Site Request Forgery (CSRF) vulnerability affecting Liman version 0.7. This security flaw allows attackers to manipulate user account settings without proper request validation. Attackers can craft malicious HTML forms to change user passwords or modify account information by tricking logged-in users into submitting unauthorized requests.

Critical Impact

Unauthorized account manipulation including password changes and account information modification through forged cross-site requests targeting authenticated users.

Affected Products

• Liman 0.7

Discovery Timeline

• 2026-01-29 - CVE CVE-2020-37007 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2020-37007

Vulnerability Analysis

This CSRF vulnerability exists because Liman 0.7 fails to implement proper anti-CSRF tokens or validate the origin of incoming requests. When a user is authenticated to the Liman application, their browser automatically includes session cookies with every request to the application domain. Without CSRF protections, an attacker can create a malicious webpage containing a hidden form that submits requests to Liman's password change or account modification endpoints.

The vulnerability is classified under CWE-565 (Reliance on Cookies without Validation or Integrity Checking), indicating that the application relies solely on session cookies for authentication without additional verification that requests originate from legitimate user actions.

Root Cause

The root cause of this vulnerability is the absence of CSRF token validation in sensitive account management endpoints. Liman 0.7 does not implement anti-CSRF mechanisms such as synchronizer tokens, double-submit cookies, or origin header validation. This allows any webpage to craft and submit requests to account modification endpoints as long as the victim user is authenticated.

Attack Vector

The attack requires social engineering to trick an authenticated Liman user into visiting a malicious webpage. This can be accomplished through phishing emails, malicious links on compromised websites, or embedded content in forums. When the victim visits the attacker-controlled page while logged into Liman, the malicious form automatically submits a password change request using the victim's authenticated session.

The attack flow involves an attacker hosting a webpage containing a hidden HTML form with the new password value and the target Liman endpoint. When loaded in the victim's browser, JavaScript automatically submits the form, or the victim is tricked into clicking a disguised button. Since the browser includes the victim's session cookies, Liman processes the request as legitimate.

For technical exploitation details, see the Exploit-DB #48869 public exploit documentation.

Detection Methods for CVE-2020-37007

Indicators of Compromise

• Unexpected password changes or account modifications reported by users
• Web server logs showing password change requests with unusual referrer headers from external domains
• Multiple account modification requests originating from the same external referrer URL

Detection Strategies

• Monitor web application logs for password change or account modification requests lacking proper anti-CSRF tokens
• Implement alerting on account changes where the HTTP Referer header does not match the application's domain
• Review access logs for sequential account modification requests that may indicate automated CSRF exploitation

Monitoring Recommendations

• Enable detailed HTTP request logging including Referer and Origin headers for account management endpoints
• Configure SIEM rules to detect password changes followed by immediate session invalidation or login from different IP addresses
• Implement user behavior analytics to identify anomalous account modification patterns

How to Mitigate CVE-2020-37007

Immediate Actions Required

• Upgrade Liman to a version that includes CSRF protection mechanisms if available
• Implement a Web Application Firewall (WAF) rule to validate the Origin and Referer headers on sensitive endpoints
• Educate users about the risks of clicking untrusted links while logged into the application
• Consider disabling or restricting access to the password change functionality until proper CSRF protections are implemented

Patch Information

Refer to the GitHub Project Repository for potential updates or patches. Additional vulnerability details are available in the VulnCheck Security Advisory.

Workarounds

• Implement SameSite cookie attributes set to Strict or Lax to prevent cross-origin cookie inclusion
• Configure web server or reverse proxy to reject requests to sensitive endpoints with external Referer headers
• Require re-authentication for password changes and other critical account modifications
• Deploy a custom CSRF token validation layer at the reverse proxy or WAF level

# Example: Apache configuration to restrict Referer header
<Location "/api/password">
    SetEnvIf Referer "^https://your-liman-domain\.com" valid_referer
    <RequireAll>
        Require env valid_referer
    </RequireAll>
</Location>