CVE-2020-35676 Explained : Impact and Mitigation
Learn about CVE-2020-35676, a critical XSS vulnerability in BigProf Online Invoicing System before 3.1, allowing attackers to gain administrative privileges and potentially take over the application. Find mitigation steps and preventive measures here.
BigProf Online Invoicing System before 3.1 is vulnerable to a cross-site scripting (XSS) attack during user self-registration, allowing an attacker to execute arbitrary JavaScript and potentially gain administrative privileges.
Understanding CVE-2020-35676
This CVE involves a security issue in the BigProf Online Invoicing System that could lead to an application takeover.
What is CVE-2020-35676?
- The vulnerability arises from improper sanitization of XSS payloads during user registration.
- An attacker can input a malicious payload that executes when the admin views the registered users' list.
- Successful exploitation grants the attacker administrative control, enabling an application takeover.
The Impact of CVE-2020-35676
- Allows attackers to execute arbitrary JavaScript in the context of the admin.
- Results in the unauthorized acquisition of administrative privileges.
- Leads to a complete application compromise.
Technical Details of CVE-2020-35676
The technical aspects of the vulnerability in the BigProf Online Invoicing System.
Vulnerability Description
- Failure to properly sanitize XSS payloads during user self-registration.
- Vulnerable endpoints: app/membership_signup.php and app/admin/pageViewMembers.php.
Affected Systems and Versions
- Affected System: BigProf Online Invoicing System before version 3.1.
Exploitation Mechanism
- Attacker registers using self-registration functionality.
- Crafts a payload that executes when the admin accesses the user list.
- Gain administrative privileges leading to an application takeover.
Mitigation and Prevention
Protective measures to mitigate the CVE-2020-35676 vulnerability.
Immediate Steps to Take
- Update the BigProf Online Invoicing System to version 3.1 or newer.
- Implement input validation and output encoding to prevent XSS attacks.
- Monitor user registrations and admin activities for suspicious behavior.
Long-Term Security Practices
- Conduct regular security audits and penetration testing.
- Educate users and administrators on secure coding practices.
- Stay informed about security best practices and vulnerabilities.
Patching and Updates
- Apply security patches promptly.
- Stay updated on the latest releases and security advisories.