Security readout for executives and security teams
Plain-English summary
TeleMessage exposed a Spring Boot Actuator heap dump endpoint at /heapdump through May 5, 2025. CISA lists CVE-2025-48927 as known exploited, and the CVE description says it was exploited in the wild in May 2025. The issue is mainly data exposure, not system takeover, but exposed process memory can create serious downstream risk.
Executive priority
Treat this as urgent for any organization using TeleMessage. Although the CVSS score is medium, confirmed exploitation changes the business priority because memory disclosure can expose sensitive communications, credentials, or tokens depending on runtime contents.
Technical view
CVE-2025-48927 is CWE-1188: insecure default initialization of a resource. The TeleMessage service exposed a Spring Boot Actuator heap dump endpoint at /heapdump. CVSS 3.1 is 5.3, network exploitable, low complexity, no privileges or user interaction, with low confidentiality impact only.
Likely exposure
Exposure appears limited in the source bundle to TeleMessage service deployments through 2025-05-05. The bundle does not identify specific customer environments, versions beyond “0,” CPEs, or whether self-hosted deployments exist.
Exploitation context
Active exploitation is supported by CISA KEV and the CVE description. WIRED is cited as reporting the TeleMessage hack context. The source bundle does not provide exploit details, attacker identity, or a complete impact assessment.
Researcher notes
The public bundle is sparse. It supports exposed /heapdump, Spring Boot Actuator, CWE-1188, CVSS 5.3, and exploitation in May 2025. It does not include vendor advisory details, patch identifiers, affected build numbers, or forensic indicators.
Mitigation direction
- Check TeleMessage vendor guidance for fixed service status or compensating controls.
- Disable or restrict public access to exposed Spring Boot Actuator heap dump endpoints.
- Require authentication and network controls for operational diagnostic endpoints.
- Review logs for suspicious access to /heapdump before remediation.
- Rotate secrets if heap dump exposure may have revealed credentials or tokens.
Validation and detection
- Inventory any TeleMessage service usage in the organization.
- Confirm whether exposure existed on or before 2025-05-05.
- Verify /heapdump is not publicly reachable on relevant services.
- Review application configuration for exposed Spring Boot Actuator endpoints.
- Check CISA KEV tracking for required remediation timelines if applicable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-1188: Exact CWE lookup
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Open ATT&CK lookupCVE-2025-48927 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wired.com/story/how-the-signal-knock-off-app-telemessage-got-hacked-in-20-minutes/CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-48927CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Initialization of a Resource with an Insecure Default
Initialization of a Resource with an Insecure Default represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.