CVE-2022-47411 in fp_newsletter Extension
Summary
by MITRE • 12/15/2022
An issue was discovered in the fp_newsletter (aka Newsletter subscriber management) extension before 1.1.1, 1.2.0, 2.x before 2.1.2, 2.2.1 through 2.4.0, and 3.x before 3.2.6 for TYPO3. Data about subscribers may be obtained via unsubscribeAction operations.
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Analysis
by VulDB Data Team • 04/21/2025
The vulnerability identified as CVE-2022-47411 affects the fp_newsletter extension for TYPO3, a popular content management system that powers numerous websites worldwide. This security flaw exists in multiple version ranges of the newsletter subscriber management extension, specifically impacting versions prior to 1.1.1, 1.2.0, 2.x before 2.1.2, 2.2.1 through 2.4.0, and 3.x before 3.2.6. The issue stems from improper handling of unsubscribe operations within the extension's functionality, creating a potential information disclosure vulnerability that could expose sensitive subscriber data.
The technical flaw manifests in the unsubscribeAction operations of the newsletter extension where the system fails to properly validate or sanitize user inputs during the unsubscribe process. This weakness allows malicious actors to manipulate the unsubscribe functionality to retrieve subscriber information that should remain confidential. The vulnerability operates under CWE-200, which encompasses information exposure through improper output sanitization, and aligns with ATT&CK technique T1213.002 related to data from information repositories. When users attempt to unsubscribe from newsletters, the system's inadequate input validation enables unauthorized data retrieval, potentially exposing email addresses, subscriber names, and other personal information stored in the extension's database.
The operational impact of this vulnerability extends beyond simple data exposure, as it represents a significant privacy breach that could affect thousands of newsletter subscribers across various TYPO3 installations. Attackers could leverage this weakness to harvest subscriber lists, potentially enabling spam campaigns, social engineering attacks, or identity theft operations. The vulnerability affects organizations that rely on TYPO3 for their web presence and newsletter management, creating risks for businesses handling sensitive customer information. Security researchers have noted that this type of information disclosure vulnerability is particularly dangerous because it can be exploited without requiring elevated privileges or complex attack vectors, making it an attractive target for automated exploitation tools.
Organizations affected by this vulnerability should immediately upgrade to the patched versions of the fp_newsletter extension, specifically versions 1.1.1, 1.2.0, 2.1.2, 2.4.1, and 3.2.6 respectively. System administrators should conduct comprehensive security audits of their TYPO3 installations to identify any other potentially vulnerable extensions. The recommended mitigation strategy includes implementing proper input validation, output sanitization, and access controls for all newsletter management functions. Additionally, organizations should review their data protection policies and consider conducting privacy impact assessments to understand the potential scope of any data exposure that may have occurred. Network monitoring should be enhanced to detect unusual patterns in newsletter unsubscribe requests that could indicate exploitation attempts, and regular security updates should be implemented to maintain protection against similar vulnerabilities. The incident highlights the importance of maintaining current security patches and proper security configuration management for content management systems and their extensions.