External risk intelligence

TeleMessage Service Information Disclosure.

CVE advisoryKnown Exploit

CVE-2025-48927

The vulnerability involves a Spring Boot Actuator endpoint (/heapdump) that is exposed by default. Spring Boot applications are commonly deployed as internet-facing web services or APIs, making such endpoints often reachable from the public internet when configured with insecure defaults.

Smarsh Telemessage

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

The TeleMessage service is vulnerable due to an insecure default configuration of its Spring Boot Actuator. This flaw exposes a heap dump endpoint, which attackers can access. This could lead to unauthorized access to sensitive information within the affected systems.

Vulnerable component: TeleMessage service
Core weakness: Exposed heap dump endpoint
Main business impact: Potential data exposure

Attack Path

How an attacker could exploit the issue

The TeleMessage service configured Spring Boot Actuator with an exposed heap dump endpoint. This allowed attackers to access sensitive information. This vulnerability was exploited in the wild in May 2025, potentially leading to data compromise.

Exposed heap dump endpoint.
Attacker accesses sensitive data.
Data control or impact results.

Live Threat

Current exploitation, exposure, and threat context

The TeleMessage service experienced a security incident in May 2025 due to a misconfiguration in its Spring Boot Actuator. This allowed attackers to access sensitive system information via a heap dump endpoint. The incident highlights the risk associated with improperly secured service endpoints, potentially impacting system integrity and data confidentiality. Organizations utilizing this service are advised to review their security configurations.

Likely attacker skill level: Low.
Required access or conditions: Public network access.
Business risk or urgency: High, requires immediate attention.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the TeleMessage service could allow attackers to access sensitive information by exploiting an exposed heap dump endpoint. Organizations using this service should take immediate steps to identify affected systems, reduce their exposure, apply vendor-provided fixes, and confirm that these fixes are effective. Continuous monitoring for related malicious activity is also recommended.

Identify TeleMessage assets.
Restrict network access.
Apply vendor fix; validate.
Monitor for threats.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is the TeleMessage service and its primary function?

The TeleMessage service is a product from smarsh that enables users to send and receive messages. It was configured with a feature called Spring Boot Actuator, which can offer diagnostic details about the running application.

What type of vulnerability is identified by CVE-2025-48927 in the TeleMessage service?

CVE-2025-48927 describes an insecure default configuration vulnerability (CWE-1188). The TeleMessage service exposed a heap dump endpoint via its Spring Boot Actuator, permitting unauthorized access to sensitive information.

How can an attacker exploit the TeleMessage vulnerability?

An attacker can exploit this vulnerability by accessing the exposed heap dump endpoint, typically located at a /heapdump URI. This endpoint, part of the Spring Boot Actuator, can reveal sensitive application data if not properly secured.

What is the relevance of the TeleMessage vulnerability, CVE-2025-48927, according to Halo Surface Signal?

Halo Surface Signal scores this vulnerability as 'Likely' due to its nature. The vulnerability involves a Spring Boot Actuator endpoint (/heapdump) exposed by default, which is often reachable from the public internet in commonly deployed internet-facing web services or APIs.

What are the recommended actions to address the TeleMessage service vulnerability?

Organizations should identify all TeleMessage assets, restrict network access to the affected service, apply vendor-provided fixes, and validate their effectiveness. Continuous monitoring for suspicious activity is also advised to detect and respond to potential threats.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.