CVE-2020-10491 in PHPKB Standard Multi-Language
Summary
by MITRE
CSRF in admin/manage-departments.php in Chadha PHPKB Standard Multi-Language 9 allows attackers to add a department via a crafted request.
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Analysis
by VulDB Data Team • 05/12/2025
The vulnerability identified as CVE-2020-10491 represents a critical cross-site request forgery weakness within the Chadha PHPKB Standard Multi-Language version 9 content management system. This flaw exists in the administrative interface, specifically within the manage-departments.php script that handles department management operations. The vulnerability allows unauthenticated attackers to manipulate the system by crafting malicious requests that appear to originate from legitimate administrative users. The flaw stems from the absence of proper anti-CSRF token validation mechanisms within the department creation functionality, enabling attackers to execute unauthorized administrative actions without proper authentication or authorization.
The technical implementation of this vulnerability demonstrates a classic CSRF attack vector where the application fails to validate the authenticity of requests submitted through the web interface. In the context of PHPKB Standard Multi-Language 9, when administrators access the department management functionality, the system should validate that requests originate from legitimate administrative sessions. However, the absence of CSRF tokens or other validation mechanisms means that malicious actors can construct HTTP requests that, when executed by an authenticated administrator, result in unauthorized department creation. This vulnerability operates at the application layer and specifically targets the administrative privilege escalation capabilities of the system. The flaw aligns with CWE-352, which categorizes cross-site request forgery vulnerabilities as those that allow attackers to perform actions with the privileges of authenticated users without their knowledge or consent. The vulnerability presents a significant risk as it allows attackers to expand the organization's attack surface by creating new departments, potentially enabling further exploitation or data manipulation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it enables attackers to establish persistent footholds within the system's administrative structure. When an attacker successfully exploits this vulnerability, they can add new departments to the system, which may provide opportunities for creating additional user accounts, modifying existing department configurations, or even establishing backdoor access points. The administrative department creation functionality becomes a gateway for broader system compromise, as departments often serve as organizational units that control access to various system resources and data. This vulnerability can be particularly dangerous in multi-tenant or enterprise environments where departmental structures directly correlate with access control policies and data segregation. The attack can be executed through various means including social engineering campaigns where administrators are tricked into visiting malicious websites or through automated tools that construct and submit the crafted requests. The vulnerability also aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation, as the attacker leverages legitimate administrative capabilities to expand their access. The impact is compounded by the fact that department creation often involves minimal validation, allowing attackers to create departments with potentially malicious configurations or access patterns.
Mitigation strategies for CVE-2020-10491 should focus on implementing robust anti-CSRF protection mechanisms throughout the application's administrative interface. The most effective approach involves incorporating unique, unpredictable CSRF tokens for each administrative session and validating these tokens on every state-changing request. The system should generate and validate tokens that are tied to specific user sessions and time-limited to prevent replay attacks. Additionally, implementing proper input validation and output encoding can help prevent exploitation of related vulnerabilities. Organizations should also consider implementing additional security controls such as multi-factor authentication for administrative accounts, regular security audits of administrative interfaces, and monitoring for unusual administrative activities. The patching process should involve updating the PHPKB application to a version that includes proper CSRF protection mechanisms, which typically involves adding token generation and validation logic to all administrative functions including department management. Security teams should also establish monitoring procedures to detect unauthorized department creation attempts and implement network segmentation to limit the potential impact of successful exploitation. The implementation of Content Security Policy headers and proper session management can further reduce the attack surface and prevent exploitation of similar vulnerabilities in other administrative functions. Regular vulnerability assessments and penetration testing should be conducted to identify and remediate other potential CSRF vulnerabilities within the application's administrative interface.