CVE-2025-48927

TeleMessage TM SGNL Initialization of a Resource with an Insecure Default Vulnerability

Exploited in attacks Medium 5.3 Attack chance: 12%

What it is

The TeleMessage service through 2025-05-05 configures Spring Boot Actuator with an exposed heap dump endpoint at a /heapdump URI, as exploited in the wild in May 2025.

CISA: TeleMessage TM SGNL contains an initialization of a resource with an insecure default vulnerability. This vulnerability relies on how the Spring Boot Actuator is configured with an exposed heap dump endpoint at a /heapdump URI.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Deadline for US federal agencies: July 22, 2025

Added to the CISA list: July 1, 2025
Published: May 28, 2025
Severity: Medium 5.3 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 12% in the top 4.0% of all known vulnerabilities
Weakness: CWE-1188
More details: NVD · CVE.org · CISA

All references (1)

https://www.wired.com/story/how-the-signal-knock-off-app-telemessage-got-hacked-in-20-minutes/

More exploited flaws from TeleMessage

Added	Vulnerability	Product	Severity	Attack chance
Jul 1, 2025	Exposure of Core Dump File to an Unauthorized Control SphereCVE-2025-48928	TM SGNL	Medium 4.0	0.6%
May 12, 2025	Hidden FunctionalityCVE-2025-47729	TM SGNL	Low 1.9	0.4%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.