How severe is CVE-2018-18391?

CVE-2018-18391 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-18391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18391?

CVE-2018-18391 affects Moxa Thingspro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18391?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-18391 published?

CVE-2018-18391 was published on 2018-10-19 and last updated on 2026-06-17.

CVE-2018-18391

CVE-2018-18391 is a high-severity vulnerability in Moxa Thingspro with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Moxa Thingspro
Published: 2018-10-19
Last modified: 2026-06-17

Description

User Privilege Escalation in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.

Frequently asked questions

What is CVE-2018-18391?: User Privilege Escalation in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.
How severe is CVE-2018-18391?: CVE-2018-18391 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-18391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18391?: CVE-2018-18391 affects Moxa Thingspro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-18391 published?: CVE-2018-18391 was published on 2018-10-19 and last updated on 2026-06-17.

References

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/10/18/klcert-18-019-moxa-thingspro-iiot-gateway-and-device-management-software-solutions-user-privilege-escalation/

Affected products (1)

cpe:2.3:a:moxa:thingspro:2.1:*:*:*:*:*:*:*

More vulnerabilities in Moxa Thingspro

CVE-2018-18396 — Critical (CVSS 9.8): Remote Code Execution in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.
CVE-2018-18395 — Critical (CVSS 9.8): Hidden Token Access in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.
CVE-2018-18394 — Critical (CVSS 9.8): Sensitive Information Stored in Clear Text in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions…
CVE-2018-18393 — Critical (CVSS 9.8): Password Management Issue in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.
CVE-2018-18392 — High (CVSS 8.8): Privilege Escalation via Broken Access Control in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions…
CVE-2018-18390 — High (CVSS 7.5): User Enumeration in Moxa ThingsPro IIoT Gateway and Device Management Software Solutions version 2.1.

All CVEs affecting Moxa Thingspro →