// For flags

CVE-2025-37730

Logstash Improper Certificate Validation in TCP output

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client” mode, as hostname verification in TCP output was not being performed when the ssl_verification_mode => full was set.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-04-16 CVE Reserved
  • 2025-05-06 CVE Published
  • 2025-05-06 CVE Updated
  • 2025-05-12 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
CAPEC
  • CAPEC-94: Adversary in the Middle (AiTM)
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Elastic
Search vendor "Elastic"
 Logstash
Search vendor "Elastic" for product "Logstash"
 >= 8.0.0 < 8.17.6
Search vendor "Elastic" for product "Logstash" and version " >= 8.0.0 < 8.17.6"
en
Affected
Elastic
Search vendor "Elastic"
 Logstash
Search vendor "Elastic" for product "Logstash"
 >= 8.18.0 < 8.18.1
Search vendor "Elastic" for product "Logstash" and version " >= 8.18.0 < 8.18.1"
en
Affected
Elastic
Search vendor "Elastic"
 Logstash
Search vendor "Elastic" for product "Logstash"
 >= 9.0.0 < 9.0.1
Search vendor "Elastic" for product "Logstash" and version " >= 9.0.0 < 9.0.1"
en
Affected