CVE-2021-3396
OpenNMS Horizon RCE via JEXL2 expression
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-3396- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-3396- Updated
- 2026-11-02
EUVDEUVD-2022-3490 No score
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.
- Record
EUVD-2022-3490- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c3mp-9vx3-2rvv
OpenNMS Horizon RCE via JEXL2 expression
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.
- Record
GHSA-c3mp-9vx3-2rvv- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-3396- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-c3mp-9vx3-2rvv
OpenNMS Horizon RCE via JEXL2 expression
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.
- Record
GHSA-c3mp-9vx3-2rvv- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.opennms:opennmsMaven |
16.0.0 to 27.0.3 | 27.0.4 |
org.opennms.features:org.opennms.features.measurementsMaven |
16.0.0 to 27.0.3 | 27.0.4 |
org.opennms:opennms-provisionMaven |
16.0.0 to 27.0.3 | 27.0.4 |
org.opennms:opennms-utilMaven |
16.0.0 to 27.0.3 | 27.0.4 |
org.opennms:opennmsMaven |
16.0.0 up to 27.0.4 | 27.0.4 |
org.opennms.features:org.opennms.features.measurementsMaven |
16.0.0 up to 27.0.4 | 27.0.4 |
org.opennms:opennms-provisionMaven |
16.0.0 up to 27.0.4 | 27.0.4 |
org.opennms:opennms-utilMaven |
16.0.0 up to 27.0.4 | 27.0.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3396 is a high vulnerability (CVSS 8.8) in Opennms Horizon, published February 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.37%, the 83rd percentile. Fixed in org.opennms:opennms 27.0.4.