CVE-2022-47409 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. Attackers can unsubscribe everyone via a series of modified subscription UIDs in deleteAction operations.
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Analysis
by VulDB Data Team • 04/21/2025
The vulnerability identified as CVE-2022-47409 affects the fp_newsletter extension for TYPO3, a popular content management system used by numerous organizations worldwide. This security flaw exists in multiple version ranges including 1.1.1, 1.2.0, 2.x through 2.4.0, and 3.x through 3.2.5, representing a significant risk to TYPO3 installations that rely on this newsletter subscription management functionality. The vulnerability stems from insufficient input validation and access control mechanisms within the deleteAction operations of the extension, creating a critical weakness that can be exploited by unauthorized individuals to manipulate subscription data.
The technical flaw manifests in the improper handling of subscription UIDs during delete operations, allowing attackers to craft malicious requests that target multiple subscription records simultaneously. When an attacker modifies the subscription UID parameters in deleteAction operations, the system fails to properly validate whether the authenticated user has authorization to remove those specific subscriptions. This lack of proper access control validation creates a path for privilege escalation and unauthorized data manipulation. The vulnerability aligns with CWE-285, which addresses insufficient authorization checks, and represents a clear violation of the principle of least privilege in system design.
The operational impact of this vulnerability extends beyond simple data manipulation, potentially enabling attackers to disrupt newsletter services, compromise user privacy, and gain insights into subscriber lists. An attacker with access to the system could systematically unsubscribe all users from newsletters, effectively disabling the subscription service and potentially causing service disruption. Additionally, the ability to target specific subscription records through UID manipulation could expose sensitive user data, as the vulnerability may allow for enumeration of valid subscription identifiers. This weakness could also facilitate further attacks by providing attackers with information about the underlying database structure and user management systems.
Organizations using affected versions of the fp_newsletter extension should immediately implement mitigations including updating to the patched versions 1.1.1, 1.2.0, 2.1.2, 2.2.1 through 2.4.0, and 3.2.6 or later. The recommended approach involves comprehensive access control implementation where each delete operation validates both authentication and authorization for the specific subscription record being targeted. System administrators should also consider implementing additional monitoring mechanisms to detect unusual patterns of subscription deletions and establish proper input sanitization procedures. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the T1078 credential access sub-technique where unauthorized users gain elevated privileges through system flaws. Organizations should also review their overall security posture and ensure proper network segmentation to limit the potential impact of such vulnerabilities in their TYPO3 environments.