CVE-2022-1828 in PDF24 Articles to PDF Plugin
Summary
by MITRE • 06/20/2022
The PDF24 Articles To PDF WordPress plugin through 4.2.2 does not have CSRF check in place when updating its settings, which could allow attackers to make a logged in admin change them via a CSRF attack
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Analysis
by VulDB Data Team • 06/20/2022
The vulnerability identified as CVE-2022-1828 affects the PDF24 Articles To PDF WordPress plugin version 4.2.2 and earlier, representing a critical security flaw that undermines the integrity of administrative functions within WordPress environments. This issue stems from the absence of proper cross-site request forgery protection mechanisms within the plugin's settings update functionality, creating a significant attack vector for malicious actors who can manipulate administrative operations without proper authorization. The vulnerability specifically targets the plugin's administrative interface where users with administrator privileges can modify plugin configurations, making it particularly dangerous in environments where administrators frequently access the WordPress dashboard.
The technical flaw manifests as a missing CSRF token validation during the settings update process, which violates fundamental security principles for web application development. When administrators navigate to the plugin's settings page and submit modifications, the application fails to verify that the request originates from a legitimate administrative session rather than from a maliciously crafted request. This absence of token validation allows attackers to construct specially crafted HTTP requests that, when executed by an authenticated administrator, can alter plugin configurations without the user's knowledge or consent. The vulnerability resides in the plugin's backend processing logic where input validation and session integrity checks are insufficiently implemented, creating a direct pathway for unauthorized administrative actions.
The operational impact of this vulnerability extends beyond simple configuration changes, potentially enabling attackers to compromise the entire WordPress environment through the manipulation of PDF generation settings. Attackers could exploit this weakness to redirect PDF outputs to malicious destinations, modify security parameters, or disable critical plugin features that protect against other attacks. The vulnerability is particularly concerning because it requires no authentication from the attacker beyond having an administrator visit a malicious webpage, making it a prime target for social engineering campaigns where administrators might unknowingly trigger the attack. This flaw can lead to data exfiltration, privilege escalation, or the establishment of persistent backdoors through modified plugin configurations that control how content is processed and delivered.
Mitigation strategies for CVE-2022-1828 should prioritize immediate plugin updates to versions that implement proper CSRF protection mechanisms, following the principle of least privilege and maintaining current software versions. Administrators should also implement additional security measures including network segmentation, monitoring for unusual administrative activity, and regular security audits of installed plugins to identify similar vulnerabilities. The implementation of CSRF tokens should be enforced at the application level according to established security standards and practices, ensuring that all administrative actions require proper session validation and request integrity checks. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses, and represents a clear violation of the ATT&CK technique T1078.004 for Valid Accounts and T1566.001 for Phishing, as it enables attackers to leverage legitimate administrative sessions for unauthorized actions. Organizations should also consider implementing web application firewalls and security headers to provide additional layers of protection against similar attack vectors that exploit session management weaknesses in web applications.