CVE-2019-18982 in Pimcore
Summary
by MITRE
bundles/AdminBundle/Controller/Admin/EmailController.php in Pimcore before 6.3.0 allows script execution in the Email Log preview window because of the lack of a Content-Security-Policy header.
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Analysis
by VulDB Data Team • 02/20/2024
The vulnerability identified as CVE-2019-18982 affects Pimcore content management platform versions prior to 6.3.0, specifically within the AdminBundle module where the EmailController handles email log preview functionality. This security flaw stems from the absence of a properly configured Content-Security-Policy header in the response sent to clients when previewing email logs. The missing security header creates an exploitable condition that allows malicious actors to inject and execute arbitrary scripts within the context of the admin interface, potentially leading to complete system compromise.
The technical root cause of this vulnerability resides in the improper implementation of security headers within the email log preview feature. When administrators access email log entries through the EmailController, the application fails to include a Content-Security-Policy header in the HTTP response. This header is essential for defining which sources of content can be executed within the browser context, particularly for inline scripts, external resources, and other potentially dangerous elements. Without this protection mechanism, web browsers default to less restrictive security policies that allow script execution from various sources, including those injected through malicious payloads.
The operational impact of this vulnerability is significant for organizations using affected Pimcore versions, as it provides a potential attack vector for remote code execution and privilege escalation. An attacker who gains access to the administrative interface or can manipulate email log entries could leverage this weakness to execute malicious scripts within the context of the admin user's session. This could lead to unauthorized access to sensitive data, modification of content management systems, or even complete system compromise depending on the administrative privileges of the compromised account. The vulnerability affects the email log preview functionality specifically, making it a targeted attack surface that could be exploited during routine administrative tasks.
This vulnerability aligns with CWE-1021, which describes insufficient enforcement of security headers, and represents a classic case of missing security controls in web applications. From an ATT&CK framework perspective, this weakness maps to T1059.001 (Command and Scripting Interpreter: PowerShell) and T1566 (Phishing) as attackers could use this vulnerability to execute malicious scripts or create phishing campaigns. The lack of Content-Security-Policy header enforcement creates a fundamental security gap that violates the principle of least privilege and defense in depth. Organizations should implement immediate mitigations including upgrading to Pimcore 6.3.0 or later, which contains the patched implementation of proper security headers, and configuring additional security measures such as web application firewalls to monitor for suspicious script execution patterns. Additionally, administrators should review and enforce proper access controls, implement multi-factor authentication, and conduct regular security assessments to identify similar vulnerabilities in other components of their web applications.