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CVE-2023-5909

HIGH
Published 2023-11-30T22:05:59.595Z
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CVSS Score

V3.1
7.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.195
Higher than 19.5% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Description

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (HIGH) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

References

Solutions


PTC has released and recommends users to update to the following versions:

* KEPServerEX should upgrade to v6.15 or later
* ThingWorx Kepware Server should upgrade to v6.15 or later
* ThingWorx Industrial Connectivity should upgrade to ThingWorx Kepware Server v6.15 or later
* OPC-Aggregator should upgrade to v6.15 or later
* ThingWorx Kepware Edge: Upgrade to v1.8 or later

Refer to secure configuration guide here https://www.ptc.com/en/support/refdoc/ThingWorx_Kepware_Server/6.15/ThingWorx%20Kepware%20Server%20Secure%20Deployment%20Guide

If additional questions remain, please contact PTC Technical Support https://support.ptc.com/apps/case_logger_viewer/cs/auth/ssl/log

For more information, see PTC's advisory https://www.ptc.com/en/support/article/CS405439 .

Credits & Acknowledgments

finder

Shawn Hoffman

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

software toolbox
thingworx industrial connectivity

ENISA Scoring

CVSS Score (3.1)

7.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score

0.080
probability

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-rw69-wr48-w7px

Advisory Details

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Advisory provided by GitHub Security Advisory Database. Published: December 1, 2023, Modified: December 1, 2023

References

Published: 2023-11-30T22:05:59.595Z
Last Modified: 2024-08-02T08:14:24.693Z
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