CVE-2025-47729 in Archiving Backend
Summary
by MITRE • 05/08/2025
The TeleMessage archiving backend through 2025-05-05 holds cleartext copies of messages from TM SGNL (aka Archive Signal) app users, which is different functionality than described in the TeleMessage "End-to-End encryption from the mobile phone through to the corporate archive" documentation, as exploited in the wild in May 2025.
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Analysis
by VulDB Data Team • 05/14/2025
The vulnerability identified as CVE-2025-47729 represents a critical security deviation in the TeleMessage archiving infrastructure that undermines the cryptographic assurances promised to users. This issue affects the TeleMessage archiving backend system through the date 2025-05-05 and specifically involves the handling of messages originating from TM SGNL application users. The system maintains cleartext copies of these messages in its archive storage, creating a significant departure from the documented end-to-end encryption framework that TeleMessage claims to provide. This discrepancy between documented security posture and actual implementation creates a substantial risk for organizations relying on the platform for secure communications.
The technical flaw manifests in the backend archiving process where messages are stored in plaintext format rather than maintaining the encrypted state that should persist throughout the communication lifecycle. This cleartext storage represents a violation of fundamental security principles and creates multiple attack vectors for malicious actors who might gain access to the archive storage. The vulnerability operates at the data persistence layer where encryption controls fail to be enforced during the archiving process, effectively creating a data exposure point that defeats the purpose of the claimed end-to-end encryption. This issue aligns with CWE-312 (Cleartext Storage of Sensitive Information) and represents a failure in the cryptographic implementation that violates industry standards for secure data handling.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential compliance violations and reputational damage for organizations using the TeleMessage platform. When attackers exploit this weakness, they gain access to unencrypted communications that were presumably protected through the platform's encryption mechanisms. The exploitation in the wild during May 2025 demonstrates that threat actors have actively targeted this specific implementation flaw, indicating the vulnerability's attractiveness for malicious purposes. Organizations may face regulatory scrutiny if they fail to maintain the encryption assurances that TeleMessage's marketing and documentation suggest are in place, particularly in industries governed by data protection regulations such as healthcare, finance, or government communications.
Mitigation strategies should focus on immediate remediation of the cleartext storage issue through implementation of proper encryption controls at the archiving layer. Organizations should conduct comprehensive audits of their TeleMessage configurations to identify all instances where cleartext storage may occur and implement encryption enforcement mechanisms. The solution requires modification of the backend archiving process to ensure that messages remain encrypted throughout their lifecycle, including during storage operations. Security teams must also implement monitoring controls to detect unauthorized access attempts to the archive storage and establish proper key management practices that align with NIST SP 800-57 recommendations. Additionally, organizations should consider implementing network segmentation and access controls to limit exposure of the archive backend to only authorized personnel and systems, following the principle of least privilege as outlined in the MITRE ATT&CK framework for credential access and data exfiltration techniques.