CVE-2024-13296 in Mailjet
Summary
by MITRE • 01/09/2025
Deserialization of Untrusted Data vulnerability in Drupal Mailjet allows Object Injection.This issue affects Mailjet: from 0.0.0 before 4.0.1.
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Analysis
by VulDB Data Team • 09/03/2025
The vulnerability identified as CVE-2024-13296 represents a critical deserialization of untrusted data flaw within the Drupal Mailjet module, specifically exposing systems to object injection attacks. This vulnerability resides in the module's handling of serialized data structures, creating a pathway for malicious actors to inject arbitrary objects into the application's memory space. The issue affects all versions of the Mailjet module from version 0.0.0 up to but not including version 4.0.1, indicating a long-standing problem that has persisted across multiple release cycles. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly verify the integrity and origin of serialized data before processing.
The technical exploitation of this vulnerability occurs when the Mailjet module receives serialized data from an untrusted source, typically through user input or external API responses. During the deserialization process, the application fails to validate the serialized object structure, allowing attackers to craft malicious serialized payloads that, when processed, can execute arbitrary code or manipulate application behavior. This type of vulnerability directly maps to CWE-502, which specifically addresses deserialization of untrusted data as a weakness that can lead to object injection attacks. The attack vector typically involves manipulating data sent to the module through various interfaces including web forms, API endpoints, or configuration parameters that the module processes using standard PHP serialization functions.
The operational impact of CVE-2024-13296 extends beyond simple data corruption or application instability, potentially enabling full system compromise and persistent access. Attackers leveraging this vulnerability can execute arbitrary code on the affected Drupal server, potentially leading to complete system takeover, data exfiltration, or establishment of backdoors for continued access. The vulnerability affects the core functionality of the Mailjet integration within Drupal, which could disrupt email delivery services and compromise the integrity of email communications. Organizations running affected versions face significant risk as the vulnerability can be exploited remotely without authentication, making it particularly dangerous in production environments where Drupal installations may be exposed to the internet. The impact is further compounded by the fact that many Drupal installations may not have proper network segmentation or monitoring in place to detect such attacks.
Mitigation strategies for CVE-2024-13296 should prioritize immediate patching of the Mailjet module to version 4.0.1 or later, which contains the necessary fixes to prevent deserialization of untrusted data. Organizations should implement comprehensive input validation and sanitization measures that reject any serialized data without proper cryptographic signatures or explicit validation. Network-level protections including web application firewalls and intrusion detection systems should be configured to monitor for suspicious deserialization patterns and block malicious payloads. Additionally, implementing principle of least privilege access controls and regular security audits can help minimize the potential impact of exploitation. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation of remote services, and T1059, covering command and scripting interpreter usage, as attackers may leverage this vulnerability to execute malicious commands on the compromised system. Regular security monitoring and vulnerability assessment programs should be enhanced to detect similar deserialization vulnerabilities in other modules and components within the Drupal ecosystem.