What’s Vulnerable › Vulnerabilities

CVE-2021-3396

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-17 · updated 2026-06-17

Description

OpenNMS Meridian 2016, 2017, 2018 before 2018.1.25, 2019 before 2019.1.16, and 2020 before 2020.1.5, Horizon 1.2 through 27.0.4, and Newts <1.5.3 has Incorrect Access Control, which allows local and remote code execution using JEXL expressions.

Affected products

• The OpenNMS Group Horizon: from 16.0.0 through 27.0.3
• The OpenNMS Group Meridian: from 2016.1.0 through 2016.1.24; from 2017.1.0 through 2017.1.26; from 2018.1.0 before 2018.1.25; from 2019.1.0 before 2019.1.16; from 2020.1.0 before 2020.1.5 — fixed in 2018.1.25, 2019.1.16, 2020.1.5
• OpenNMS Newts: before 1.5.3 — fixed in 1.5.3

How to fix

Upgrade to a fixed version: The OpenNMS Group Meridian 2018.1.25, 2019.1.16, 2020.1.5; OpenNMS Newts 1.5.3. Check the vendor advisory for mitigations.

References

• https://www.opennms.com
• https://www.opennms.com/en/blog/2021-02-16-cve-2021-3396-full-security-disclosure/
• https://www.opennms.com
• https://www.opennms.com/en/blog/2021-02-16-cve-2021-3396-full-security-disclosure/

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