CVE-2020-20971 in PbootCMS
Summary
by MITRE • 06/02/2022
Cross Site Request Forgery (CSRF) vulnerability in PbootCMS v2.0.3 via /admin.php?p=/User/index.
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Analysis
by VulDB Data Team • 06/05/2022
The CVE-2020-20971 vulnerability represents a critical cross site request forgery flaw identified in PbootCMS version 2.0.3, specifically affecting the administrative interface at the /admin.php?p=/User/index endpoint. This vulnerability resides within the content management system's user management functionality and exposes the application to unauthorized administrative actions that can be executed without proper user consent or authentication. The flaw allows attackers to manipulate the CMS's administrative operations through maliciously crafted requests that appear legitimate to the server.
This CSRF vulnerability stems from the absence of proper anti-forgery tokens or validation mechanisms within the administrative user management interface. When administrators perform actions such as user creation, modification, or deletion through the affected endpoint, the application fails to verify the authenticity of the request origin or validate that the request was genuinely initiated by the authenticated administrator. The vulnerability specifically targets the user management module where administrative privileges are required to perform sensitive operations, making it particularly dangerous for unauthorized privilege escalation and account manipulation.
The operational impact of this vulnerability extends beyond simple data manipulation as it enables attackers to potentially gain persistent administrative control over affected PbootCMS installations. An attacker could leverage this flaw to create new administrator accounts, modify existing user permissions, or delete critical user accounts, effectively compromising the entire administrative domain. The vulnerability is particularly concerning because it operates at the administrative level where the highest privileges are granted, allowing for complete system compromise. The attack vector typically involves tricking an authenticated administrator into visiting a malicious website or clicking on a crafted link that automatically submits requests to the vulnerable endpoint.
Security professionals should note that this vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in web applications. The flaw also maps to ATT&CK technique T1078.004, which covers legitimate credentials, as successful exploitation could lead to unauthorized administrative access. Organizations running PbootCMS v2.0.3 should immediately implement mitigations including the addition of anti-forgery tokens to all administrative endpoints, implementation of proper referer header validation, and enforcement of SameSite cookie attributes. The recommended remediation approach involves updating to a patched version of PbootCMS or implementing custom CSRF protection measures that validate request authenticity through unique tokens generated per session and validated against server-side state.
Additional security measures include network-level protections such as implementing web application firewalls that can detect and block suspicious administrative request patterns, conducting regular security audits of administrative interfaces, and ensuring proper access controls through multi-factor authentication for administrative accounts. The vulnerability demonstrates the critical importance of validating all administrative requests through robust authentication mechanisms and implementing defense-in-depth strategies that protect against various attack vectors including CSRF, session hijacking, and privilege escalation attempts. Organizations should also consider implementing logging and monitoring solutions that can detect unusual administrative activities that may indicate exploitation attempts.