CVE-2025-70031: SunbirdEd-portal CSRF Vulnerability

CVE-2025-70031 Overview

CVE-2025-70031 is a Cross-Site Request Forgery (CSRF) vulnerability discovered in Sunbird-Ed SunbirdEd-portal version 1.13.4. This vulnerability allows attackers to trick authenticated users into performing unintended actions on the web application without their knowledge or consent. Sunbird-Ed is an open-source learning management platform used for digital education solutions, making this vulnerability particularly concerning for educational institutions and organizations relying on the platform.

Critical Impact

Attackers can leverage this CSRF vulnerability to perform unauthorized actions on behalf of authenticated users, potentially compromising user accounts, modifying educational content, or accessing sensitive student and educator data within the Sunbird-Ed portal.

Affected Products

• Sunbird-Ed SunbirdEd-portal version 1.13.4

Discovery Timeline

• 2026-03-09 - CVE CVE-2025-70031 published to NVD
• 2026-03-11 - Last updated in NVD database

Technical Details for CVE-2025-70031

Vulnerability Analysis

This vulnerability is classified as CWE-352: Cross-Site Request Forgery (CSRF). The SunbirdEd-portal fails to properly validate the origin of requests, allowing malicious actors to craft specially designed web pages or links that, when visited by an authenticated user, execute unauthorized actions on the Sunbird-Ed platform.

The attack requires user interaction—specifically, an authenticated victim must navigate to a malicious website or click a crafted link while having an active session with the Sunbird-Ed portal. Once triggered, the attacker can perform any action the victim is authorized to execute, including modifying user profiles, changing course content, enrolling or unenrolling users from courses, or accessing protected educational resources.

Root Cause

The root cause of this vulnerability lies in the absence or improper implementation of CSRF protection mechanisms in the SunbirdEd-portal application. The application fails to include unique, unpredictable tokens in state-changing requests, and does not adequately verify the Origin or Referer headers to ensure requests originate from legitimate sources. Without these safeguards, the server cannot distinguish between legitimate user-initiated requests and forged requests originating from malicious third-party sites.

Attack Vector

The attack is network-based and requires user interaction. An attacker would typically:

1. Craft a malicious HTML page containing hidden forms or scripts targeting the SunbirdEd-portal endpoints
2. Distribute the malicious page via phishing emails, social media, or compromised websites
3. When an authenticated SunbirdEd user visits the malicious page, their browser automatically sends the forged request along with their valid session cookies
4. The SunbirdEd-portal processes the request as if it were legitimate, executing the attacker's intended action

The vulnerability can be exploited through various methods including auto-submitting forms, image tags with malicious source URLs, or JavaScript-based fetch/XMLHttpRequest calls. Technical details and proof-of-concept information are available in the GitHub Gist Example.

Detection Methods for CVE-2025-70031

Indicators of Compromise

• Unexpected changes to user profiles, course enrollments, or educational content without corresponding user activity logs
• Unusual HTTP POST requests originating from external referer domains to sensitive SunbirdEd-portal endpoints
• User reports of unauthorized actions being performed on their accounts
• Anomalous patterns in web server logs showing state-changing requests with external or missing referer headers

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests to sensitive endpoints lacking valid CSRF tokens
• Monitor authentication and authorization logs for suspicious activity patterns indicating potential CSRF exploitation
• Deploy browser-based security tools that can detect when users navigate to known malicious domains
• Conduct regular security audits and penetration testing specifically targeting CSRF vulnerabilities

Monitoring Recommendations

• Enable detailed logging for all state-changing HTTP requests within the SunbirdEd-portal application
• Configure alerts for requests to sensitive endpoints where the referer header does not match expected portal domains
• Monitor for bulk or rapid changes to user data or content that may indicate automated CSRF attacks
• Implement user behavior analytics to detect anomalous account activity patterns

How to Mitigate CVE-2025-70031

Immediate Actions Required

• Review the SunbirdEd Portal Repository for security updates and patches addressing this vulnerability
• Implement additional authentication requirements for sensitive operations until a patch is available
• Educate users about the risks of clicking unknown links while authenticated to the Sunbird-Ed portal
• Consider temporarily restricting access to the portal from untrusted networks

Patch Information

Organizations should monitor the official Sunbird-Ed GitHub Repository for security advisories and patches addressing CVE-2025-70031. Upgrade to the latest patched version of SunbirdEd-portal as soon as it becomes available. Verify the implementation of proper CSRF protection mechanisms after applying any updates.

Workarounds

• Implement server-side CSRF token validation by adding anti-CSRF tokens to all forms and AJAX requests
• Configure the SameSite cookie attribute to Strict or Lax to prevent cookies from being sent with cross-site requests
• Deploy a reverse proxy or WAF with CSRF protection capabilities in front of the SunbirdEd-portal
• Implement Origin and Referer header validation at the application or infrastructure level

# Example: Configure SameSite cookie attribute in web server
# For Apache, add to configuration:
Header edit Set-Cookie ^(.*)$ $1;SameSite=Strict

# For Nginx, add to server block:
proxy_cookie_path / "/; SameSite=Strict";